ROLEX: A STAINLESS STEEL 'OYSTER PERPETUAL' WATCH, CIRCA 2015 The 31-jewel Cal-2231 automatic movement, circular black dial with applied polished Arabic numerals for 3, 6 & 9 and pink baton for numerals, outer minute divisions, polished baton hands, centre seconds, brushed and polished tonneau form case, screw down back, fitted brushed oyster link bracelet with signed folding clasp, case, dial and movement signed, serial no. M449284, with Rolex case, case: 31mm