60.00 mm case diameter, matte silver dial signed PATEK, PHILIPPE & CIE, GENEVE 170419, Roman numerals with outer minute track, 36 hour power reserve indicator at 12 o'clock, subdial for seconds at 6 o'clock, blued steel spade hands, coin polished bezel, polished circular case back engraved U.S. NAVY, polished cuvette, Cal. 21 manual wind nickel finish jeweled EXTRA movement signed PATEK, PHILIPPE & Co No 170419 GENEVE and numbered twice.Movement number: 170419.Inner case back: 0.900 274695 (hallmark) P.P.Co.Inner cuvette case back: 0.900 274695 (hallmark) P.P.Co.Accompanied by a fitted wooden case.Additional Note:For a rare set of three Patek Philippe silver pocket watches with Movement No.'s 170'414, 170'416, 170'417, Case No.'s 274'699, 274'701, 274'693, please see:Christies's: An Evening of Exceptional WatchesNew YorkDecember 7, 2017