Rolex. A fine stainless steel automatic calendar wristwatch
Model: Single Red Submariner
Reference: 1680
Date: Circa 1971
Movement: 26-jewel Cal.1570 automatic, adjusted to 5 positions, No.D994005
Dial: Black, red Submariner, luminous dot hour markers, baton quarters, white outer minute divisions, magnified date aperture at 3, polished Mercedes hands with luminous inserts, polished centre seconds
Case: Brushed and polished tonneau form, screw down back, shouldered screw down crown, bi-directional bezel with black calibrated insert, No.2879615
Strap/Bracelet: Associated black fabric NATO
Buckle/Clasp: Steel buckle
Signed: Case, dial & movement
Size: 40mm
Footnotes:
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'.