OMEGA - a stainless steel Speedmaster chronograph bracelet watch, 41mm., , OMEGA - a Speedmaster chronograph bracelet watch. Stainless steel case with tachymeter bezel. Case width 41mm. Reference 310.30.42.50.01.001, serial 83711456. Manual wind calibre 3861. Black dial with luminous baton hour markers, subsidiary recorder dials to three, six and nine. Fitted to a signed stainless steel bracelet with folding clasp. Box and papers., , Please note: When placing absentee bids, your bids will be rounded up to the nearest bid increment. For more information click the 'Important Notices for Purchasers' button above.