The Omega Constellation Automatic Chronometer reference 2852 (often with suffixes like 2852 SC or 2852-1 SC) is a classic vintage automatic wristwatch from the iconic Constellation line, introduced around 1955 and produced mainly through the late 1950s into the early 1960s.

It features a round case, typically in stainless steel (with gold or two-tone variants available), measuring approximately 35 mm in diameter and a slim profile of about 8–12 mm thick including the crystal. The design includes a smooth bezel, press-in caseback often engraved with the Geneva Observatory motif, and a distinctive pie-pan dial with a raised outer chapter ring.

The watch is powered by the Omega Caliber 501 (early examples, 19 jewels) or more commonly the Caliber 505, an automatic movement beating at 19,800 vph and officially certified as a chronometer with adjustments for five positions and temperature. It displays central seconds with no date complication.

Dials are typically “De Luxe” pie-pan style in silver, two-tone, or occasionally other colors, featuring applied gold hour markers (such as arrowhead, dauphine, or crosshair designs), luminous hands, and text reading “Automatic Chronometer Officially Certified” alongside the Constellation name. It is fitted with an acrylic (plexiglass) crystal and often paired with leather straps or vintage bracelets.

Highly regarded by collectors for its mid-century elegance, proven chronometer precision, and status as an early Constellation model, the 2852 remains a sought-after vintage piece.

Specifications

Year: 1954
Contents: Watch only 
Reference: 2852
Case size: 35mm
With crown: 38mm
Movement: Automatic Cal 501
Crystal: Acrylic (original Omega)
Wrist circumference: n/a

Condition

Dial

The dial is in a good condition, appears to be refinished

Bezel 

Nice smooth bezel with minimal wear

Case

Beautiful gold capped case, no over polishing visible 

Case back 

Case back is in a perfect condition, no polishing marks and still has original sticker

Movement

Movement has just been serviced (6 month warranty)

Crystal

Original Omega crystal, minor scratches