150. Rolex. Belle montre bracelet en acier avec date mouvement automatique Rolex. A fine stainless steel automatic calendar bracelet watch Model: 'Single Red' Submariner Reference: 1680 Date: Purchased 25th May 1974 Movement: 26-jewel Cal.1570 automatic, adjusted to 5 positions and temperature, No.D123903 Dial: Black, luminous dot hour markers, baton quarters, white outer minute divisions, magnified date aperture at 3, polished Mercedes hands with luminous inserts, centre seconds Case: Brushed and polished tonneau form, screw down back, shouldered screw down crown, calibrated bezel, No.3745938 Strap/Bracelet: Brushed 9315 Oyster folded link, end links stamped 380/B Buckle/Clasp: Signed folding clasp Signed: Case, dial & movement Accompaniments: Punched Certificate of Guarantee dated 25/05/1974, service receipt dated 18th June 2020 Production of the reference 1680 first began in 1966 and was the first Submariner to feature a date function. The earliest of these models had the depth rating with meters positioned first, followed by feet rating. For over a decade the word 'Submariner' was depicted in red on the dial of the 1680 and as such has since earned the nickname of a 'Single Red Submariner'. This year, Rolex celebrates the 70th Anniversary of this legendary tool watch.