Gruen GIlt Metal and Steel Airman American Airlines Jumping Hours Wristwatch circa 1960s

14 Kt Gold Alpina Gruen / Rolex Prince Doctors Jump Hour Wrist Watch Extremely Rare Collectors ! Movement : Cal. 877S rectangular-shaped mechanical movement, 17 jewels, Manual Winding Jump Hour. Case : 14 Kt Gold, 21.7 mm Wide and Length 37 mm without lugs, including Lugs 46.4 mm The present wristwatch is one of the exceedingly rare examples of a "doctor's" watch produced by Gruen in the late 1920s, Advertised as a timepiece for technicians and "radio and mechanical engineers"-anyone who needed to measure time in seconds, the calibre 877 movements were manufactured by Aegler in Bienne who also supplied movements to Rolex for their "Prince" model. Aegler, a very close neighbour to Gruen's Precision Factory, shared ownership during a time with both Gruen and Rolex, the full name of the company being "Aegler, Société Anonyme, Fabrique des Montres Rolex & Gruen Guild...

Omega Gilt Top and Stainless Steel Back Wristwatch, Retailed by Tiffany & Co, Ref. 351, circa 1960s, with automatic bumper movement. 14 yellow go...