ROLEX SUBMARINER, REF.1680 MARK 1, A STAINLESS STEEL BRACELET WATCH WITH DATE, CIRCA 1979ROLEX | SUBMARINER, REF.1680 MARK 1, A STAINLESS STEEL BRACELET WATCH WITH DATE, CIRCA 1979Case No: 61XXXXXCalibre: 1575, automatic, signedDial: Black, signedCase: 40mm, stainless steel, screw down case back, signedBracelet: Stainless steel, folding clasp, approximately 188mm, signedAccompaniments: Maker's service paper and service guarantee card勞力士，「Submariner」1680型號，精鋼自動上弦鏈帶腕錶，配日期顯示，年份約1979。附原廠保養證明及服務保證卡.The reference 1680 was first introduced in 1967 and the run ended in approximately 1979/80, it is the very first Submariner with a date complication, now officially known as the Submariner Date. The present example is a "White Submariner" fitted with the Mark 1 dial, featuring closed 6's, the "SUBMARINER" line being the same width as the depth rating line and the 'L' in Rolex is perfectly in the middle under the Rolex coronet logo. Additionally, the tritium on its hour markers and hands has developed a creamy patina over the years, making this timepiece an excellent example of the first iteration of the "White Submariner and of the Submariner Date.