Circa 1960s.
This watch is a great find from Grandpa's treasure box. A vintage Gruen Airflight manual wind wristwatch featuring a 24 hour dial in a chrome/stainless steel case. This watch has a unique dial with apertures at each hour that show a numeric disc which jumps automatically at noon to read 13-24 and then back to 1-12 hour markers at midnight. Beneath the dial is a Swiss unadjusted Gruen caliber N510 SS manual winding movement with 17 jewels that runs strong and kept good time over a 24 hour period. The inside back case reads: Stainless Steel Back, Gruen Watch Co., Switzerland, 510-RSS. Case measurements are approximately 35mm wide x 41mm in overall length
This watch is a great find from Grandpa's treasure box. A vintage Gruen Airflight manual wind wristwatch featuring a 24 hour dial in a chrome/stainless steel case. This watch has a unique dial with apertures at each hour that show a numeric disc which jumps automatically at noon to read 13-24 and then back to 1-12 hour markers at midnight. Beneath the dial is a Swiss unadjusted Gruen caliber N510 SS manual winding movement with 17 jewels that runs strong and kept good time over a 24 hour period. The inside back case reads: Stainless Steel Back, Gruen Watch Co., Switzerland, 510-RSS. Case measurements are approximately 35mm wide x 41mm in overall length