Are all Orrefors signed?

An interesting heavy crystal bowl by "Orrefors", Sweden. Signed with paper label.

Mid Century glass artist Nils Landberg's Red Tulpanglas designed in 1956, produced in 1957 by Orrefors glassworks. The delicately tinted glasses ar...

Orrefors heavy dropped formed blue vase and one large rounded heavy vase designed by Sven Palmqvist. Wonderful glass with exceptional blue color that collaborates with the clear gl...

Nice Fish Graal Vase by Edward Hald for Orrefors, Sweden 1957 Item e6741 A heavy vase of the Graal series designed by Edvward Hald for Orrefors Sweden in 1938. Clear and green glas decorated with underwater flora and fishes, overlayed with a thick clear glass layer. This example dates to 1957. Signed with: 'Orrefors Graal No 471 M Edward Hald'. An authentic piece of Midcentury Modern Scandinavian glass design. Edward Hald (1883 – 1980) is one of the well-known Swedish glass artists who have worked for Orrefors. After studying in Leipzig, he completed his artistic training with Henri Matisse in Paris. The famous Graal glass is one of the first masterpieces of Edward Hald, which he developed together with Simon Gate and Knut Bergqvist...

Wonderful art glass vase "Haze" designed by Erika Lagerbielke and produced at Orrefors, Sweden. Good condition, signed and labeled Measures: H 23....

Wonderful collection of 9 tulip glasses in grey tinted blue colored and clear glass design. Manufactured at Orrefors in Sweden and design by Nils Landberg. Good vintage condition ...