Circa 1950.
Here is a vintage Gruen Curvex Batwing model in a 10K gold-filled case with gold tone Arabic numerals on a butler silver finished dial. This watch is part of the Gruen Ristside series of driver's watches and the "Batwing" styled lugs are hinged and swivel allowing for a comfortable fit on the wrist. This watch sets and winds smoothly and is powered by an unadjusted Swiss grade 440 manual hand winding movement with 17 jewels that runs strong and kept good time over a 24 hour period. The inside back case reads: Cased and Timed in USA by Gruen Watch Co., Apex Watch Case MFG Co., 10KT Goldfilled, 440-641. The case measures approximately 24mm wide x 48mm from lug end to lug end. The watch is quadruple signed by Gruen as seen on the crown, dial, movement, and case. *NS
Here is a vintage Gruen Curvex Batwing model in a 10K gold-filled case with gold tone Arabic numerals on a butler silver finished dial. This watch is part of the Gruen Ristside series of driver's watches and the "Batwing" styled lugs are hinged and swivel allowing for a comfortable fit on the wrist. This watch sets and winds smoothly and is powered by an unadjusted Swiss grade 440 manual hand winding movement with 17 jewels that runs strong and kept good time over a 24 hour period. The inside back case reads: Cased and Timed in USA by Gruen Watch Co., Apex Watch Case MFG Co., 10KT Goldfilled, 440-641. The case measures approximately 24mm wide x 48mm from lug end to lug end. The watch is quadruple signed by Gruen as seen on the crown, dial, movement, and case. *NS