Vintage Omega Seamaster De Ville Ref. B 6320, Swiss Watch, Automatic Cal. 670 from 1966

This vintage Omega Seamaster De Ville from 1966 offers the kind of understated elegance that made the De Ville line a favorite throughout the 1960s. With its slim gold case, clean dial design, and compact proportions, it delivers that classic Omega look that remains timeless today. The reference B 6320 is especially charming thanks to its smaller 31.5mm case, which wears beautifully thanks to long, graceful lugs that extend to 37mm and give the watch an airy, balanced silhouette.

The dial is crisp and bright, with a soft sunburst finish that plays gently with the light. Applied gold indices and matching baton hands create a refined, minimalist layout, while the classic “Seamaster De Ville” script adds the right touch of mid-century charm. The gold Omega logo sits proudly at 12 o’clock, matching the applied “Omega Automatic” text. Together, these elements give the dial a calm, confident presence that feels both vintage and enduringly stylish.

Inside the watch is the Omega Caliber 670, a compact automatic movement designed specifically for smaller cases. Its architecture allowed Omega to create elegant, thin models without sacrificing performance. The serial number 23499271dates this example precisely to 1966, placing it in the heart of the golden age of Omega dress watches.

Case

• 31.5mm gold case 

• 37mm lug-to-lug for balanced wrist presence

• Slim 9mm thickness

• Straight, elongated lugs typical of De Ville references

• Signed crown at 3 o’clock

• Acrylic crystal

Movement

• Omega Caliber 670 automatic

• Designed for compact mid-century case dimensions

• Serial number 23499271, dating production to 1966

• Smooth, classic Omega 1960s automatic architecture

Dial

• Bright sunburst dial

• Applied gold baton hour markers

• Slim gold baton hands

• Applied Omega logo and “Omega Automatic” at 12 o’clock

• Elegant “Seamaster De Ville” script at 6 o’clock

• Minute track around the perimeter

Continue your journey through Omega’s legacy:
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Omega Seamaster
Omega Ladymatic
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