How do I adjust a French mantel clock?

A luxurious French Louis XVI style gilt bronze ormolu and alabaster (onyx-marble) three piece mantle clock and garniture set, possibly attributed to Raingo Freres. The fine quality antique originating in France in the late 19th century, exquisite Parisian work, exceptionally executed in opulent, elegant, and sophisticated King Louis XVI style, timeless neoclassical taste, comprising: classical architectural case mantel clock, having pointed bronze doré finial, flanked by scrolled foliates and lyre motifs, fancy enamel dial with Arabic numerals, inscribed F. Lapointe, Paris, eight-day time-and-strike movement signed Samuel Marti 1900 (Paris, 1870-1890), original Apollo mask sun-burst pendulum hanging below clock drum, flanked by matched pair of two arm candlestick garnitures, each with matching scrolled foliates and lyre finial, tapering column support with two candle nozzles, rising on stepped molded base, terminating in patinated brass disc feet. Markings: Pendulum stamped "R" "1721" ormolu on clock & garnitures stamped "1321"; possibly attributed to R. Freres / Raingo Freres. Dial signed by French enameller "F. Lapointe, Paris" Movement stamped by the firm of well-known French clockmaker Samuel Marti et Cie, Paris, second half of 19th century. Dimensions: (approx) As pictured: 18.5" High, 36" Wide, 5.5" Deep; 27.5 lbs total. Clock: 18.5" High, 13" Wide, 5.5" Deep; Candelabra garnitures: (each) 12" High, 8" Wide, 4.25" Deep; Condition: Presents splendidly. Great original unrestored antique condition. Currently not operating as it's lacking a suspension spring. Retaining bell, pendulum, and key. Losses to decorative elements. Wear consistent with age and use. To ensure the clock arrives as beautiful as it leaves here, and due to the rather delicate nature of antique clocks...

This Fine french four glass mantel clock has a beautifully gilded case with thick bevelled glass panels and doors. the eight day movement with visible jewelled Brocot escapement is m...

French Red Tortoiseshell Boulle clock, Samuel Marti, Paris. Red tortoiseshell case inlaid with fine brass decoration surmounted by an ormolu finial, ormolu mounts and standing on raised bracket feet. The front of the case with glazed viewing aperture behind a central ormolu mount. The sides of the case decorated with fishscale fret decoration. Gilded and chased dial with individual blue enamel numerals and original ‘blued’ steel hands. Eight day French movement with starburst pendulum, anchor escapement and outside countwheel, striking the hours and halves on a silvered bell. The backplate stamped H & F, Paris and marked for Samuel Marti, Paris, number 4005. C.1880 ‘Samuel Marti & Cie’ were well known French clockmakers working from their premises at Le Pays De Montbeliard Paris from just before 1860. They were awarded the medaille de bronze...

Dial signed G. Fabre, 4 rue des Filles du Calvaire, Paris Clockwork signed Samuel Marti – Médaille d’Or 1900 A Louis XVI style gilt-bronze and statuary Carrare marble clock set, consisting of a clock and a pair candelabra...

French gilt champleve clock garniture Rectangular case standing on a stepped moulded base with turned feet, applied frieze decoration below a beaut...

Fine Art Deco Marble Mantel Clock Art Deco mantel clock housed in a fan shaped case with finely figured Rouge, Cream and Black marble ins...