Omega Speedmaster Professional Chronograph 145.022-71
A Very Nice Speedmaster from 1971
Matte, black tritium stepdial, tritium hands
Stainless steel watch case with screwdown caseback
High grade Omega calibre, 861 manual wind movement, 17 jewels, signed Omega, serial: 28433145
Original, long Omega stainless steel bracelet No. 12
The serial number corresponds to a 145.022-69, which was produced from 1969-1971. We presume Omega used a spare movement from the latter reference.