The Omega Constellation reference 168.017 (known as the “C-line” or “C-shape” for its curved, tonneau-like case) is a vintage automatic chronometer produced mainly from the late 1960s to early 1970s.

Designed by Gérald Genta, it evolved from the earlier 168.009 (introduced around 1964–1966) and brought bold mid-century flair to the Constellation series (launched 1952 as Omega’s flagship chronometer line), before the integrated-bracelet Manhattan models of the 1980s.

It features a stainless steel case, automatic Calibre 564 (chronometer-grade with quick-set date), date window at 3 o’clock, “Officially Certified Chronometer” text, applied baton markers, dauphine hands, and often a textured champagne or linen dial with patina.

The screw-back displays the Observatory emblem. Water resistance is approximately 30m. Your example—with its cream dial, black markers, star emblem, and black leather strap—represents a classic late-1960s steel variant, appreciated for its elegant proportions and Genta’s influential design. (Note: While some listings use 169.017, 168.017 is the standard reference for this C-shape model.)

Specifications

Year: 1968
Contents: Watch only 
Reference: 168.017
Case size: 35mm
With crown: 38mm
Movement: Automatic Cal 564
Crystal: Acrylic
Wrist circumference: n/a

Condition

Dial

The dial has some marks on the dial around the edge and a couple dots near the middle   

Bezel 

 The bezel is in a good condition for the age of the watch, nice sharp edges

Case

Case has age related marks and scratches. Overall the case has nice sharp edges (may be original polishing)

Case back 

 Case back has age related scuffs 

Movement

 Movement has just been serviced so it runs perfectly (6 month warranty on movement)

Crystal

 The crystal is in a good condition, age related cuffs when inspected closely