Rolex Oyster Perpetual Datejust Turn-O-Graph 16263. Case diameter 36mm, water resistant to 100 meters. Automatic Chronometer movement. Champagne dial with Baton hour markers. Engine turned uni-directional bezel. Bi-Metal Jubilee bracelet with folding clasp. Rolex service box and service papers dated February 2016. Circa 1991 model.