Vintage Omega Constellation: References, Value and Buying Advice

The 168.017 and 168.017 SP establish the compact C-shape Constellation with automatic caliber 564, at 34 mm and 35 mm respectively. The 168.019 keeps the 35 mm steel format but adds day and date through caliber 751, while ST 168.029 combines the same caliber with a 34 mm case and linen-textured dial. Choose the day-date only if that complication matters, since it adds another display that must align and change correctly.

Dial execution creates more separation than a one-millimetre case difference. A clean linen or stippled surface retains visible texture, while sunburst and vertically brushed dials depend on uninterrupted finishing. Applied black-inlaid indices give these silver dials their contrast. Between two comparable watches, stronger surface texture and crisp case lines carry more weight than an unsupported service claim.

At 34 mm, the 168.017 and ST 168.029 wear as compact dress watches, with the C-shape case supplying more visual width than a plain round outline. The 35 mm 168.017 SP and 168.019 gain a little more presence without leaving the proportions established by late-1960s Constellations. A silver dial with black-inlaid indices remains legible because the contrast comes from the furniture rather than a large case.

The 168.019 gives the busiest wrist view because its caliber 751 supports both day and date. The 168.017 SP is the cleaner choice at the same recorded diameter, using caliber 564 and a date display. Thickness is not established by the handled facts, so fit beneath a close cuff cannot be stated responsibly.

A refinished dial is the costliest mistake because it removes the original sunburst, stippled, linen or vertical-brush surface that distinguishes these Constellations. Over-polishing is next: the C-shape case loses its architectural transitions as the edges soften. Applied indices can lose black inserts, while day and date displays may sit off-centre or fail to change correctly.

Replacement crowns and crystals are consumable changes, but their presence must be disclosed rather than hidden inside an all-original claim. A service dial is factory-made and should be identified as a replacement; a redial is refinished outside that definition. A franken Constellation combines components that did not ship together, and a married watch joins a case and movement from different watches. The service history is unknown unless documentation establishes it.