The gold filled case measures 34mm and is in very well preserved condition with normal marks from use. The dial is signed “Omega Automatic Chronometre Officially Certified” and features a no-date crosshair layout with heavy tropical patina across the surface. The applied gold indexes are thick and faceted, with a dotted minute track around the outer edge. Inside is the automatic Omega Caliber 354, a chronometer-grade movement used by Omega in both early Seamaster chronometers and some Constellation models of the period. This bumper automatic was last serviced in 2018 and is currently running well. Finding a Seamaster with the “Chronometre Officially Certified” designation on the dial is uncommon, and early examples like this one appear far less frequently. The watch retains its original clover-shaped crown and is fitted on a high quality leather strap.