Omega - A rare steel 'Speedmaster Pre Moon' wristwatch with later additions

Omega - A rare steel 'Speedmaster Pre Moon' wristwatch with later additions, circa 1964, model 105.003-64, 'Ed White', later black ‘Professional’ dial with luminous baton markers, hands, centre chronograph sweep and ‘wide Ts’, three subsidiary dials for running seconds at 3H, minutes at 9H and hours at 6H, later outer tachymetre bezel, signed 17 jewel mechanical crown wind chronograph movement number 24958110, calibre 321, with start/stop and reset pushers above and below the crown, case, 41mm diameter, straight edged lugs, verso with engraved hippocampus logo, interior stamped 'ST 105 003-64' and with casemaker’s mark of Huguenin Frères, to a later liveried stainless steel bracelet No.32, numbered 11.71/1, the end links marked 633, with fold over clasp Although the case and movement are original (there is a year’s difference, which is not unusual when cases and movements are made separately and then assembled), this example appears to have had the dial, bezel and bracelet replaced post 1970 (the bracelet probably from a Speedmaster model 145.0022).