Rare Deco Desk Lamp
1
to
10
96
79
181
105
77
61
25
6
4
4
3
3
2
2
2
2
2
1
1
1
1
18
8
8
7
4
Sort By
Art Deco Articulating Desk Lamp. 1939 NYWF Rare Simulated Metal Leather
By Donald Deskey
Located in Peoria, AZ
Rare and Striking!
Art Deco Metal & Brass
Articulating Desk Lamp
With Faux Leather Enamel
Circa
Category
Vintage 1930s American Art Deco Table Lamps
Materials
Metal
Rare Example, Bauhaus / Art Deco Desk Lamp Designed by Gilbert Rohde
By Gilbert Rohde
Located in Buffalo, NY
Extremely rare example. Classic Bauhaus / Deco desk lamp designed by Gilbert Rohde. Retains
Category
Vintage 1930s American Art Deco Table Lamps
Materials
Nickel
1930's Rare Parcel-Silvered Art Deco Bauhaus Mushroom Style Desk Lamp
Located in Ottawa, Ontario
1930's RARE PARCEL-SILVERED ART DECO BAUHAUS
MUSHROOM STYLE DESK LAMP
Probably American
Visually
Category
Mid-20th Century American Art Deco Table Lamps
Materials
Copper
Rare Antique Art Deco Style Carved Wood Owl Sculpture Table Lamp or Desk Lamp
Located in Lisse, NL
Early twentieth century, beautifully hand-carved standing owl.
With this rare owl lamp you can
Category
Early 20th Century German Art Deco Table Lamps
Materials
Glass, Wood, Bakelite
Free Shipping
H 19 in Dm 6.5 in
Rare Art Deco Desk Lamp in Original Metallic Lacquer, Mid-20th Century
Located in Copenhagen, DK
Rare Art Deco desk lamp in original metallic lacquer.
Mid-20th century. Industrial design, mid
Category
Mid-20th Century Hungarian Table Lamps
Materials
Metal
Rare Early 1900s Chrome Art Deco Table or Desk Lamp with Adjustable Shade
Located in Lisse, NL
Incredibly stylish little Art Deco desk lamp.
There is something about this little Art Deco and
Category
Early 20th Century European Art Deco Table Lamps
Materials
Chrome
Free Shipping
H 9.8 in Dm 9.2 in
French Art Deco Desk Lamp by Schneider
By Verreries Schneider
Located in Long Island City, NY
French Art Deco adjustable table lamp by Schneider in great vintage condition. The shade is in
Category
Mid-20th Century French Art Deco Table Lamps
Materials
Bronze
Art Deco Chrome Bell Shade Desk Lamp
By Donald Deskey
Located in San Diego, CA
Beautiful and rare Art Deco table lamp, circa 1940s rewired the shade moves side to side and up and
Category
20th Century American Art Deco Table Lamps
Materials
Chrome
Rare and Hand-Crafted Art Deco Desk or Table Lamp with Stunning Wood Motifs
Located in Lisse, NL
Beautiful Art Deco table lamp from the 1920s.
This wonderfully crafted Art Deco lamp is of a great
Category
Early 20th Century European Art Deco Table Lamps
Materials
Hide, Wood
Free Shipping
H 23.5 in Dm 9 in
Josef Urban Art Deco Diminutive Bronze Desk Lamp
By Josef Urban
Located in New York, NY
Josef Urban (Austrian-American designer) Art Deco period rare diminutive desk lamp with pyramidal
Category
Early 20th Century Art Deco Table Lamps
Materials
Bronze
Dutch Art Deco Modernist desk, Netherlands, 1920s
By Tijsseling
Located in EVERDINGEN, NL
A modestly sized modernist writing desk with an assymetrical design, giving it a Haagse School
Category
Vintage 1920s Dutch Art Deco Desks and Writing Tables
Materials
Oak
Rare Brass, Metal & Wood Art Deco Mushroom Hat Table or Desk Lamp Sign M. Sabino
By Marius-Ernest Sabino
Located in Lisse, NL
100% Unrestored and original condition, mushroom design table lamp.
This very unusual and
Category
Early 20th Century French Art Deco Table Lamps
Materials
Nickel, Metal, Brass
Free Shipping
H 14.5 in Dm 13.25 in
Dutch Art Deco desk lamp by Daalderop, 1920s
By Daalderop KDM Royal Holland
Located in EVERDINGEN, NL
A rare Dutch Art Deco table lamp or bedside light by Dutch manufacturer Daalderop, c. 1925. The
Category
Vintage 1920s Dutch Art Deco Table Lamps
Materials
Nickel
Adnet Attributed Art Deco Nickel Desk Table Lamp, France, 1930s
By Jacques Adnet
Located in New York, NY
Adnet attributed deco nickel desk lamp, France, 1930s
Beautiful and rare nickel deco lamp from
Category
Vintage 1930s French Art Deco Table Lamps
Materials
Nickel
1930's, German Art Deco Desk Lamp by Gecos
By Gecos
Located in Saarbrücken, SL
Very rare burnished brass lamp from Gecos Brothers Cosack from the 1930s. With two tilt adjustments
Category
Vintage 1930s German Art Deco Table Lamps
Materials
Metal, Brass
Set of Two Rare Art Deco Desk or Table Lamps from an US Cruiser Ship, 1920s
Located in Munich, DE
Set of two rare and elegant Art Deco cast aluminium desk or table lamps from an US cruiser ship
Category
Vintage 1920s American Mid-Century Modern Table Lamps
Materials
Aluminum, Metal
H 15.75 in W 13.51 in D 4.53 in
Large Fine French Art Deco Desk/Table Lamp by Perzel
By Atelier Jean Perzel
Located in Long Island City, NY
"jaspé" metal used during World War II instead of bronze or brass - table/desk lamp with a lacquered
Category
Vintage 1940s French Art Deco Table Lamps
Materials
Metal
Rare Pierre D´Avesn French Art Deco Acid Etched Table Lamp
By Pierre D'Avesn
Located in Oakland, CA
French Art Deco table lamp created by Pierre D’Avesn, circa 1930. Unique combination of French iron
Category
Vintage 1930s French Art Deco Table Lamps
Materials
Iron
Pr 1920 French Art Deco Bronze Based Desk Lamp w/ Cut Crystal Adjustable Shade.
Located in Opa Locka, FL
Stunning 1920's French Art Deco Bronze Based with Crystal Rod Shade Desk Table Lamp. Adjustable
Category
Vintage 1920s French Art Deco Table Lamps
Materials
Bronze
H 14.5 in W 6 in D 7 in
Stunning & Rare Art Deco Etched Glass & Metal Moonfish Theme Aquarium Table Lamp
By Muller Fres Lunneville
Located in Lisse, NL
wonderful sight to see, both with the light switched on and off. This rare and stylish Art Deco lamp too
Category
Early 20th Century French Art Deco Table Lamps
Materials
Metal, Iron
Free Shipping
H 18 in W 8 in D 8 in
Jaeger LeCoultre France 1928 Art Deco Luxhora Cylindrical Desk Clock and Lamp
By Jaeger-LeCoultre, Jaeger-LeCoultre
Located in Miami, FL
Desk Lamp and Clock designed by Jacques-David LeCoultre.
An extremely rare and one of a kind
Category
Vintage 1920s French Art Deco Table Lamps
Materials
Marble, Steel, Chrome
Art Deco Period Cast Iron Desk or Table Lamp with Copper Adjustable Shade
Located in Casteren, Noord-Brabant
A rare desk lamp from the Art Deco period. The base is made of heavy cast iron, the shade is made
Category
Vintage 1920s Belgian Art Deco Table Lamps
Materials
Metal, Copper
Free Shipping
H 15.75 in W 6.3 in D 10.24 in
Art Deco Bauhaus Style Table or Desk Lamp, Copper Metal Dish Design Lamp Shade
Located in Lisse, NL
Highly stylish and timeless lamp for a desk or sidetable.
There is something about these rare
Category
Early 20th Century German Bauhaus Table Lamps
Materials
Copper
Free Shipping
H 16.1 in Dm 13 in
French Art Deco Opalescent Glass Table or Desk Lamp with Stylish Bison Sculpture
By Edmond Etling
Located in Lisse, NL
Rare and stylish bison sculpture lampby EDMOND ETLING.
This beautiful and truly artistic Art Deco
Category
Early 20th Century French Art Deco Table Lamps
Materials
Wood, Art Glass, Glass
Free Shipping
H 7.7 in W 9 in D 4.8 in
Italian Art Deco / Midcentury Modern Table / Desk Lamp by Siemens & Venini Glass
By Venini, Siemens
Located in New York, NY
A Rare and Exquisite Italian Art Deco / Mid-Century Modern desk or table lamp featuring the
Category
Mid-20th Century Italian Mid-Century Modern Table Lamps
Materials
Metal
H 17.25 in Dm 15.25 in
Pure Art Deco Desk / Table Lamp, Glass Shade On A Gilt Bronze Base Signed Degue
By David Gueron Degue
Located in Lisse, NL
Wonderfully handcrafted 1920/1930 table or desk lamp for the perfect ambiance.
This rare and finer
Category
Early 20th Century French Art Deco Table Lamps
Materials
Bronze
Free Shipping
H 16 in W 7.9 in D 7.9 in
Rare Medical Sun Table Lamp Sollux Hanau Bauhaus Metal Bakelite 1930s Art Deco
By Hanau, Sollux
Located in Nierstein am Rhein, DE
Super rare and important Bauhaus Original Hanau Sollux medical sun desk table lamp which can be
Category
Vintage 1930s German Bauhaus Table Lamps
Materials
Steel, Metal, Aluminum
Tumbler Desk Lamp by W.H. Gispen
By Gispen
Located in Amsterdam, Noord Holland
Rare nickel-plated desk lamp, ca 1930.
The lamp is called tumbler, in Dutch it is called tuimelaar
Category
Vintage 1930s Dutch Art Deco Table Lamps
Materials
Iron, Nickel
Stunning Art Deco Brass and Pate Verde Table or Desk Lamp by Jean Noverdy France
By Jean Noverdy
Located in Lisse, NL
Very well designed and top quality made, French table lamp.
This rare and stylish Art Deco table
Category
Early 20th Century French Art Deco Table Lamps
Materials
Brass
Free Shipping
H 14.2 in W 0.1 in D 0.1 in
French Art Deco Eagle Table Lamp
Located in Long Island City, NY
A French Art Deco Eagle motif table, desk lamp in nickeled bronze with light Black Patina in great
Category
Early 20th Century French Art Deco Table Lamps
Materials
Nickel, Bronze
Art Deco Schneider Katona Iron Table Lamp
By Louis Katona
Located in Oakland, CA
Exceptional and rare Art Deco iron table lamp. French fer forge of the highest quality
Category
Vintage 1920s French Art Deco Table Lamps
Materials
Iron
Set of early Just Andersen Desk Lamps, 1920s, Denmark
By Just Andersen
Located in Værløse, DK
A set of early Just Andersen table lamps made in the 1920s. A rare set in good vintage condition
Category
Vintage 1920s Danish Art Deco Table Lamps
Materials
Metal
Luc Lanel French Art Deco 1920 Ceramic Lamp
By Luc Lanel
Located in New York, NY
A rare signed French Art Deco table/desk lamp hand crafted by French artist, Luc Lanel. Signed
Category
Vintage 1920s French Art Deco Table Lamps
Materials
Ceramic
Modernist Desk Lamp Jumo designed by Yves Jujeau and André Mounique
By Yves Jujeau, Maison Jumo, Andre Mounique
Located in London, GB
Modernist desk or table Lamp designed by Yves Jujeau and André Mounique designed for the French
Category
Vintage 1930s French Art Deco Table Lamps
Materials
Chrome
Aage Holm Sørensen Scandinavian Teak Brass Table or Desk Lamp, 1950s
By Svend Aage Holm Sørensen
Located in Vienna, AT
Desk light by Aage Holm Sørensen, a rare large version Model 4109, Denmark 1950
Elegant 18.9
Category
Vintage 1950s Danish Art Deco Table Lamps
Materials
Brass
Modernist Art Deco Enamel Green and Brass Table Lamp
Located in Oakland, CA
Modernist Art Deco Enamel green and brass table lamp. The rare table lamp is unique and visually
Category
Vintage 1930s French Art Deco Table Lamps
Materials
Metal, Brass, Enamel
Vintage Mushroom Desk Lamp Model B8802 Chrome with Opal Glass
Located in Oostrum-Venray, NL
Vintage mushroom desk lamp model B8802 chrome with opal glass.
This is a very rare and highly
Category
1990s Swedish Mid-Century Modern Table Lamps
Materials
Chrome
Jacques Adnet and Black Baccarat Crystal Ball Art Deco Table Lamp
By Jacques Adnet
Located in Oakland, CA
Rare Jacques Adnet lamp made with Baccarat black crystal and a nickel base. The ball can be moved
Category
Vintage 1930s French Art Deco Table Lamps
Materials
Crystal, Metal
Rare Pair of Antique Glass & Bisque Table Lamps Decorated with Very Pretty Roses
Located in Lisse, NL
Wonderful materials and truly stylish design table lamps.
Thanks to their elegant and timeless
Category
Early 20th Century European Art Deco Table Lamps
Materials
Brass
Free Shipping
H 12.2 in Dm 6.3 in
Mid Century Modern Aluminum Saucer Reflector Lamp Russel Wright 50s Art Deco
By Russel Wright
Located in Peoria, AZ
RARE & MARVELOUS!
EARLY MID CENTURY/ DECO STYLE!
ALUMINUM REFLECTOR SHADE
AND CONE DESK/TABLE
Category
Mid-20th Century American Art Deco Table Lamps
Materials
Metal, Aluminum
Jacques Adnet and Clear Baccarat Crystal Ball Metal Base Art Deco Table Lamps
By Jacques Adnet
Located in Oakland, CA
Hermès in the 1950s to create chairs, lamps, desks, and other pieces featuring slender metal frames clad
Category
Vintage 1930s French Art Deco Table Lamps
Materials
Nickel
H 12.5 in W 4 in D 4 in
Art Deco Bronze Bird Paperweight Signed P. Sega
By Pierre Sega
Located in NANTES, FR
French artist-sculptor from the art-deco period. Produces clocks, lamps and sculptures, mainly in white
Category
Antique Mid-19th Century French Art Deco Paperweights
Materials
Marble, Bronze
Ronson 1936 Art Deco Tourette Geometric Bronze Table Touch Iip Lighter
By Ronson Art Metal Works
Located in Miami, FL
A bronze Tourette desk lighter designed by Ronson.
Very rare desk table Touch-Tip lighter, created
Category
Vintage 1930s North American Art Deco Desk Sets
Materials
Bronze
Original Art Deco Large Deluxe European Double Lily Shade Charles Schneider Lamp
Located in New York, NY
The Following Item we are offering is this Beautiful Rare Art Deco Wrought Iron and Schneider Glass
Category
Early 20th Century Desk Accessories
Glo Dial Neon Chrome Desk Clock with Original Green Neon
By Glo Dial Clock Sales Co.
Located in Oakland, CA
Art Deco Glo dial neon chrome desk clock with turquoise green Neon. Very rare and original light
Category
Vintage 1930s American Art Deco Table Lamps
Materials
Metal
Exquisite Just Andersen Table Lamp, 1930s, Denmark
By Just Andersen
Located in Værløse, DK
A timeless table lamp by Just Andersen in 1936 in a rare good condition. A center piece for a
Category
Vintage 1930s Danish Art Deco Table Lamps
Materials
Metal
Multicoloured Fratelli Toso Millefiori Lamp, Murano, circa 1910
Located in Antwerp, BE
Multicoloured Fratelli Toso style Millefiori lamp, Murano circa 1910 A rare millefiori murrine
Category
20th Century Italian Art Deco Table Lamps
Materials
Glass, Murano Glass, Art Glass
Modernist Brass Mushroom Shape Table Lamp Dutch 1920's
Located in London, GB
Modernist Art Deco table or desk curvaceous lamp in the shape of a mushroom with decorative brass
Category
Vintage 1920s Art Deco Table Lamps
Materials
Brass
Set of round Just Andersen Table Lamps, 1920s, Denmark
By Just Andersen
Located in Værløse, DK
textile from Mallorca. A rare set for a beautiful home.
* Set of metal desk lamps with a pumpkin
Category
Vintage 1920s Danish Art Deco Table Lamps
Materials
Metal
Mid Century Aluminum Table Reflector Lamp Shade Poul Henningsen Danish Design
By Poul Henningsen
Located in Peoria, AZ
ONE OF THE MOST BEAUTIFUL
ALUMINUM LAMPS IN THE WORLD!
BAUHAUS/ ART DECO STYLE!
AFTER POUL
Category
Mid-20th Century American Art Deco Table Lamps
Materials
Metal, Aluminum
H 16 in W 12 in D 12 in
Important Venini Table Lamp in Red, Form "Diamante", Murano by Paolo Venini
By Venini, Paolo Venini, Carlo Scarpa
Located in Halle, DE
A beautiful and important early 20th century Murano desk lamp in rare red colored "diamante"-form
Category
20th Century Italian Art Deco Table Lamps
Materials
Brass
H 7.88 in W 3.94 in D 3.94 in
Art Deco Panther Sculpture Desk Table Lamp, France, 1935
Located in Saarbruecken, DE
Art Deco panther sculpture desk table lamp, France 1935.
Rare yellow red bronze patina.
Base
Category
Vintage 1930s French Art Deco Animal Sculptures
Materials
Marble, Spelter
Ronson Art Metal Works 1920 Very Rare Art Deco Sterling Silver Plate Desk Box
By Louis Vincent Aronson, Ronson Art Metal Works
Located in Miami, FL
Art deco desk box designed by Ronson.
An exceptional and very rare desk box, created in New Jersey
Category
Vintage 1920s American Art Deco Decorative Boxes
Materials
Silver, Sterling Silver, Bronze
H 1.75 in W 7.25 in D 4.25 in
Ronson USA 1934 Art Deco Faux Tortoise Lacquer Rondette Desk Lighter In Chromed
By Ronson Art Metal Works, Louis Vincent Aronson
Located in Miami, FL
A stainless steel lighter designed by Ronson.
Very beautiful Rondette desk lighter, created in New
Category
Vintage 1930s North American Art Deco Tobacco Accessories
Materials
Steel, Chrome
H 3.2 in W 2.53 in D 0.83 in
Ronson 1938 Art Deco Machine Age Geometric Deluxe Classic Desk Touch Tip Lighter
By Ronson Art Metal Works, Ronson
Located in Miami, FL
A Deluxe desk lighter designed by Ronson.
This extremely rare Ronson Deluxe Classic Touch-Tip
Category
Vintage 1930s North American Art Deco Tobacco Accessories
Materials
Enamel, Steel, Chrome
H 3.6 in W 3.75 in D 2.25 in
Ronson USA 1935 Art Deco Brown Lacquered Desk Box With Touch Tip Striker
By Ronson Art Metal Works, Louis Vincent Aronson
Located in Miami, FL
Desk double box with lighter designed by Ronson.
A and very beautiful desk box, created in New
Category
Vintage 1930s American Art Deco Cigar Boxes and Humidors
Materials
Steel
Ronson USA 1935 Art Deco Black Lacquered Desk Box With Octette Touch Tip Lighter
By Ronson Art Metal Works, Louis Vincent Aronson
Located in Miami, FL
Desk double box with handles and touch tip designed by Ronson.
Very beautiful desk box with
Category
Vintage 1930s American Art Deco Cigar Boxes and Humidors
Materials
Steel, Chrome
H 4.1 in W 13.5 in D 4.5 in
Industrial French Art Deco Architects Screw Lamp "by Ki-é-klair" Model 210
By Alphonse Pinoit
Located in Hamburg, DE
This very rare French vintage engineer's lamp by Ki E Klair model 210 from 1920 is not only
Category
Vintage 1920s French Art Deco More Lighting
Materials
Aluminum, Chrome
Free Shipping
H 26.38 in W 5.91 in D 15.75 in
Ronson 1930 Pik A Cig Magic Penguin Lighter Cigarette Dispenser Desk Box
By Ronson Art Metal Works, Louis Vincent Aronson
Located in Miami, FL
Art deco magic penguin mechanical dispenser box designed by Ronson.
A beautiful, exceedingly rare
Category
Vintage 1930s American Art Deco Tobacco Accessories
Materials
Brass, Enamel, Bronze
Ronson 1930 Pik a Cig Magic Penguin Touch Tip Cigarette Dispenser Desk Box
By Louis Vincent Aronson, Ronson Art Metal Works
Located in Miami, FL
Art deco magic penguin mechanical dispenser box designed by Ronson.
A beautiful, exceedingly rare
Category
Vintage 1930s North American Art Deco Tobacco Accessories
Materials
Bronze, Steel
- 1
Get Updated with New Arrivals
Save "Rare Deco Desk Lamp", and we’ll notify you when there are new listings in this category.
Rare Deco Desk Lamp For Sale on 1stDibs
Find many varieties of an authentic rare deco desk lamp available at 1stDibs. A rare deco desk lamp — often made from metal, glass and brass — can elevate any home. There are many kinds of the rare deco desk lamp you’re looking for, from those produced as long ago as the 18th Century to those made as recently as the 20th Century. When you’re browsing for the right rare deco desk lamp, those designed in Art Deco, mid-century modern and industrial styles are of considerable interest. Louis Vincent Aronson, Jacques Adnet and Just Andersen each produced at least one beautiful rare deco desk lamp that is worth considering.
How Much is a Rare Deco Desk Lamp?
The average selling price for a rare deco desk lamp at 1stDibs is $1,830, while they’re typically $1 on the low end and $35,500 for the highest priced.
A Close Look at art-deco Furniture
Art Deco furniture is characterized by its celebration of modern life. More than its emphasis on natural wood grains and focus on traditional craftsmanship, vintage Art Deco dining chairs, tables, desks, cabinets and other furniture — which typically refers to pieces produced during the 1920s and 1930s — is an ode to the glamour of the “Roaring Twenties.”
ORIGINS OF ART DECO FURNITURE DESIGN
- Emerged in the 1920s
- Flourished while the popularity of Art Nouveau declined
- Term derives from 1925’s Exposition Internationale des Arts Décoratifs et Industriels Modernes (International Exhibition of Modern Decorative and Industrial Arts) in Paris, France
- Informed by Ancient Egypt, Cubism, Futurism, Louis XVI, De Stijl, modernism and the Vienna Secession; influenced Streamline Moderne and mid-century modernism
CHARACTERISTICS OF ART DECO FURNITURE DESIGN
- Bold geometric lines and forms, floral motifs
- Use of expensive materials such as shagreen or marble as well as exotic woods such as mahogany, ebony and zebra wood
- Metal accents, shimmering mirrored finishes
- Embellishments made from exotic animal hides, inlays of mother-of-pearl or ivory
ART DECO FURNITURE DESIGNERS TO KNOW
VINTAGE ART DECO FURNITURE ON 1STDIBS
Few design styles are as universally recognized and appreciated as Art Deco. The term alone conjures visions of the Roaring Twenties, Machine Age metropolises, vast ocean liners, sleek typography and Prohibition-era hedonism. The iconic movement made an indelible mark on all fields of design throughout the 1920s and ’30s, celebrating society’s growing industrialization with refined elegance and stunning craftsmanship.
Widely known designers associated with the Art Deco style include Émile-Jacques Ruhlmann, Eileen Gray, Maurice Dufrêne, Paul Follot and Jules Leleu.
The term Art Deco derives from the name of a large decorative arts exhibition held in Paris in 1925. “Art Deco design” is often used broadly, to describe the work of creators in associated or ancillary styles. This is particularly true of American Art Deco, which is also called Streamline Moderne or Machine Age design. (Streamline Moderne, sometimes known as Art Moderne, was a phenomenon largely of the 1930s, post–Art Nouveau.)
Art Deco textile designers employed dazzling floral motifs and vivid colors, and while Art Deco furniture makers respected the dark woods and modern metals with which they worked, they frequently incorporated decorative embellishments such as exotic animal hides as well as veneers in their seating, case pieces, living room sets and bedroom furniture.
From mother-of-pearl inlaid vitrines to chrome aviator chairs, bold and inventive works in the Art Deco style include chaise longues (also known as chaise lounges) and curved armchairs. Today, the style is still favored by interior designers looking to infuse a home with an air of luxury and sophistication.
The vintage Art Deco furniture for sale on 1stDibs includes dressers, coffee tables, decorative objects and more.
More Ways To Browse
Closet Desk
Official Desk
Grange Desk
Jb S Silver
Lecoultre 1930
Spanish Wood Jewelry Box
Jaeger Lecoultre Table Clock
Mission Tv Cabinet
Jaeger Steel
Henredon Studio One
Chrome And Black Lacquer
Ponderosa Chairs
Jolie Dining Table
Glo Dial Neon Clock
Falcon Hood
Antique Dog On Wheels
Tv Cabinets Henredon
Vintage Desktop Clocks