Introduced in 1952 the Omega Constellation filled a gap in the market that proved to be very significant. Until then Omega had produced a relatively small number of chronometers and whilst they were a success the Constellation was to promote them to being the number one chronometer producers in the world. It combined the legendary engineering as witnessed by the earlier Seamaster with superb time-keeping where every watch was independently tested for 360 hours in five positions and at 5 temperatures. 
 
This example comes in a solid 18k gold case. It's in great condition and has seen little time on the wrist. The medallion on the back stands proud of the case but has little of the normal wear. It's still well defined with crisp edges. There are no dents or scratches and no signs of abuse. Signed Omega inside the case-back.
 
The dial is the sought-after Piepan design with even spotting from gentle aging. The gold hour batons are inset with black onyx. Matching hands with a sweep seconds hand. Date at 3. The Omega logo, sign and gold star are applied. It is signed Automatic, Chronometer, Officially Certified, Constellation and Swiss Made. The crystal has minor scratches and the crown is signed Omega.
 
Inside is the Omega manufactured chronometer movement calibre 561.
 
It comes with used non-Omega green leather strap.