An Omega Speedmaster "Ed White" ST 105.003-65, featuring a swiss made handwound movement caliber: 321 in a steel case with black dial and three sub-dials, surrounded by a black bezel with dot over 90 on the orginal steel bracelet.
Model: ST 105.003-65
Serial: 24014393
Bezel: Black BASE 500 bezel with dot over 90 (DO90)
Year: 1966