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
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31.5mm gold case
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37mm lug-to-lug for balanced wrist presence
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Slim 9mm thickness
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Straight, elongated lugs typical of De Ville references
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Signed crown at 3 o’clock
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Acrylic crystal
Movement
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Omega Caliber 670 automatic
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Designed for compact mid-century case dimensions
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Serial number 23499271, dating production to 1966
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Smooth, classic Omega 1960s automatic architecture
Dial
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Bright sunburst dial
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Applied gold baton hour markers
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Slim gold baton hands
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Applied Omega logo and “Omega Automatic” at 12 o’clock
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Elegant “Seamaster De Ville” script at 6 o’clock
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Minute track around the perimeter
Continue your journey through Omega’s legacy:
Omega Dynamic
Omega Constellation
Omega Seamaster
Omega Ladymatic
Omega Speedmaster
About Brand
What makes Omega an important vintage watch brand?
Omega is one of the most influential Swiss watch manufacturers, founded in 1848. The brand is known for combining technical innovation with durable, functional design. In the vintage watch market, Omega holds a strong position thanks to its in-house movements, consistent production quality, and historically significant models that remain highly collectible today.
Why is Omega significant in vintage watch history?
Omega played a central role in 20th-century watchmaking, from precision timing in international sports to professional tool watches. The brand supplied watches to military forces, served as official timekeeper of the Olympic Games, and famously supported space exploration. Early Omega Speedmaster models, along with military Seamaster references, are considered cornerstones of vintage watch history.
Are vintage Omega watches suitable for everyday wear?
Yes. Many vintage Omega watches were designed as robust tools or professional watches intended for daily use. Time-only models powered by movements such as the Omega caliber 30T2, caliber 26x, or later caliber 5xx and 6xx families are especially well regarded for their reliability. When properly serviced, a vintage Omega watch can be worn regularly while maintaining its value as a collectible vintage watch.
What should collectors look for when buying a vintage Omega watch?
When purchasing a vintage watch from Omega, collectors should focus on originality and correct configuration. Important factors include:
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Original dial and hands with period-correct printing
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Correct case reference and matching movement
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Clear Omega serial numbers
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Evidence of professional servicing
Original components and unaltered dials are key drivers of value in the vintage Omega market.
Which vintage Omega models are most collectible?
Some of the most desirable vintage Omega watches include:
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Omega Speedmaster references such as CK2915, CK2998, and early Professional models
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Omega Seamaster military and early dive references (including CK2913 and 300 series)
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Omega Constellation chronometer models with pie-pan dials
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Early manual-wind chronographs powered by the caliber 321
These models are highly valued for their historical importance, movement quality, and lasting design appeal.
Are vintage Omega watches a good investment?
Omega offers a strong balance between brand recognition, historical relevance, and long-term collectability. In the vintage watch market, Omega watches often provide better accessibility compared to some luxury peers while still offering documented heritage and in-house movements. Well-preserved vintage Omega watches continue to show steady collector demand and price stability.
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