Vintage Rolex Stainless Steel Datejust. The model number of this Rolex is 1600. The case is stainless steel and measures 36mm in diameter. The dial is silver with stainless steel baton hour markers surrounded by a fluted bezel. The inner caseback is stamped "MONTRES ROLEX S.A. GENEVA SWITZERLAND PATENTED STAINLESS STEEL 1600 1.72". This Rolex is accompanied by a stainless steel bracelet and folding clasp. The end caps are stamped "55" and the clasp is stamped "PATENTED & REGISTERED SWISS MADE ROLEX STEELINOX 6251H". The movement is signed "MONTRES ROLEX S.A. GENEVA TWENTY-SIX 26 JEWELS ADJUSTED 5 POSITIONS AND TEMPERATURE SWISS 1570D115593". The case serial is 3117XXX. Condition: (Excellent).