Editorial
The Constellation 'Pie-Pan' is the most-iconic dress Omega of the 1960s, 34mm steel case, the signature 12-faceted dial (the 'pie-pan' shape from which it gets its nickname), and the caliber 561 chronometer-certified movement. The 168.005 reference is the prime collector target within the family.
Omega launched the Constellation line in 1952 as the brand's chronometer-grade dress family. The 'Pie-Pan' dial, twelve facets meeting at the center for a subtly-three-dimensional silhouette under different light, was used across multiple Constellation references from the late 1950s through ~1969, when Omega moved to flat dials. The 168.005 (caliber 561, automatic) is one of the most-collected references with the pie-pan dial.
Sub-references differentiate by dial color (silver, gold, occasional black) and case material (steel, gold-capped, full-gold).
Common things to check: dial originality (refinished dials are common on vintage Omega and visible under loupe, soft printing edges, mismatched applied indices); case (the lugs taper sharply to a point, over-polishing rounds the tip noticeably); hands (the original dauphine hands with luminous insert match the dial generation; service-replacement hands often differ subtly); the case-back (the 'Observatory' medallion on the Constellation back should be crisp; a worn medallion is honest age, a re-engraved one is a service flag); the original signed crown is present on most surviving examples.
