Art Deco Sapphire & Diamond Gruen Watch Co. , No. 9220. Made circa 1925. Very fine and rare, elegant and lavishly decorated sapphire and diamond-set platinum Art Deco pendant watch with matching brooch. Two-body, oval, the back centered with a diamond- and sapphire-set rosette, small diamond-set pendant with additional ogival link set with diamonds and sapphires. Matching oval brooch. Silver with champlevé radial Arabic numerals, outer minute track, engine-turned center. Blued steel Breguet hands. 20.5 x 14 mm., Extra Precision, nickel, fausses côtes decoration, 18 jewels, stamped with the Seal of Geneva Quality Mark, all adjustments, straight-line lever escapement, cut bimetallic compensation balance with Breguet balance spring, platinum dust-cap. Dial and movement signed. Dim. 33 x 18 mm, length with brooch 75 mm. Notes At the time this watch was made, Gruen was in partnership with Rolex. The company’s official name was “Société Anonyme Fabrique des Montres Rolex & Gruen Guild”. Gruen watches of the period were of the same quality as Rolex, and sometimes even better.