CIA approved / issued wrist watch for use by USAF pilots of
The North American X-15 hypersonic rocket-powered aircraft ,
The Lockheed A-12 Reconnaissance aircraft
The Lockheed SR-71 "Blackbird" long-range, high-altitude, Mach 3+ strategic reconnaissance aircraft
misc:
Worn by Mecury astronauts as back up (secondary wrist watch) timing device in the early GEMINI program along with the OMEGA Speedmaster Professional cal. 321 movement.
The last of the “thin” bezel Seamasters. Third generation “transitional” Omega Seamaster 300, Ref. 165014-63 - cal. 550 - from 1964. These models were the bridge before the fourth variant, Ref. 165.024 was introduced with its “thick” bakelite bezel and distinctive baton-hour hand.
An Omega again today. Ref 14381 Constellation. Feels a little on the small side, TBH, but the flat-link 1035 is a nice change from the BoR bracelets that are on most of my vintage Omegas.