GENTLEMAN'S WRISTWATCH, IWC, DA VINCI BETA 21, end of the 1960s. White gold 750, 185g. Rare, collectible model, Ref. 3501. hexagonal, matte-finished case No.1995416, with screw-down back. Engine-turned, steel-blue dial with white/silver-coloured
IWC Da Vinci Automatic Chronograph 18K White Gold Just Serviced | eBay