Rolex. A stainless steel automatic calendar bracelet watch with dual time zone Model: Explorer II Reference: 1655 Date: Circa 1972 Movement: 26-jewel Cal.1570 automatic, adjusted to 5 positions & temperature, No.D613256 Dial: Black, luminous baton hour markers, large triangular marker at 12, white minute markers, date aperture at 3, white pointed baton hands with luminous inserts, centre seconds, orange arrow tipped GMT hand Case: Brushed and polished tonneau form, screw down back and shouldered crown, 24-hour markers to bezel, No.3510246 Strap/Bracelet: Fitted brushed 78360 Oyster link Buckle/Clasp: Signed folding clasp, stamped OP1 Signed: Case, dial & movement Size: 38mm Footnotes: The Rolex Explorer II 1655 first appeared on the market in 1971 and continued the tradition of the earlier Explorer models which were first introduced in 1953. The watch was originally developed to accompany speleologists on their cave exploration expeditions and as such was designed with extreme durability in mind. Due to its limited commercial success and short production period, the reference 1655 is today one of the more sought after Vintage Rolex models. The model features a fixed bezel with 24 hour display and a special 24 hour hand that can be set to distinguish day from night hours. It is known as the 'Freccione', Italian for 'big arrow', amongst collectors. For further information on this lot please visit Bonhams.com