18K yellow gold Omega Constellation chronometer, circa 1950's, is a center-seconds, self-winding, water-resistant, 18K yellow gold chronometer wristwatch.

The 35mm round case has a snap-on case back with embossed Constellation symbol and washer fit in the case back, concave lugs, and faceted crown. The gold dial features applied yellow gold faceted indexes, above the 6, the signature and an applied gold star, with luminous yellow gold dauphine hands. The movement is calibre 505, 24 jewels, warrantied by Aaron Faber for 12 months.