Stainless Steel, aftermarket rivet oyster style bracelet with folding clasp, rotating diver bezel, black service dial, automatic Chronometer (Cal. 1575), date (not quick-set), screw-down crown, plastic crystal, Ref. 1680, 2.9 million serial, warranty dated December 1972, 40mm, serviced by Rolex in 2000 and 2017, Near Mint in service box with original papers and service papers