Gruen Watch Co. , "Curvex", Precision. Produced in the 1940's.Fine, rectangular, 14K yellow gold “Driver's” wristwatch. two-body, solid, polished, stepped bezel, hooded ridged lugs. matte silver with applied yellow gold Arabic numerals, auxiliary seconds dial. "Alpha" blued steel hands. Cal. 330, curvex, rhodium-plated, 17 jewels, straight line lever escapement, monometallic balance, Breguet balance-spring.Dial, case and movement signed.Dim. 20 x 36 mm.