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OMEGA Seamaster 234.30.41.21.01.001 SS Co-Axial Auto 300M Black Men's tA0HG1js

OMEGA Seamaster 234.30.41.21.01.001 SS Co-Axial Auto — USD 6,399

Ref: Seamaster

ActiveUSD 6,399
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Brand
Omega
Condition
Pre-owned - Excellent
Reference
Seamaster
Seller
ryoiwa (99.4★)
Location
JP
Listed
Jun 17, 2026

⌚ Watch Specifications

Reference data · AI-verified specifications

Movement

Type
Automatic mechanical
Caliber
Omega Caliber 552 or 565
Power Reserve
50 hours (Caliber 565)
Diameter
Approximately 37mm
Water Resist.
120 meters
Bezel
Bi-directional rotating
Production
1967

📖 About This Reference

The Omega Seamaster 120, introduced in 1967, represents Omega's early foray into professional dive watches, positioned as a more accessible alternative to the Seamaster 300. It offered robust water resistance in a more compact and versatile case design, appealing to both enthusiasts and those seeking a capable sports watch for everyday wear and light diving activities. This reference helped solidify Omega's reputation in the burgeoning dive watch market of the era. This particular Seamaster 120 features a stainless steel case, often with a diameter around 37mm, and is typically powered by an automatic mechanical movement, such as the Omega Caliber 552 or 565, known for their reliability. The watch is characterized by its rotating bezel, often bi-directional, and a screw-down case back, contributing to its water resistance. Dials varied, but commonly featured luminous hour markers and hands for legibility in low light conditions. For collectors, the Seamaster 120 holds significance as a transitional model, bridging the gap between earlier Seamaster models and the more specialized dive watches that would follow. Its enduring design and robust construction mean that well-maintained examples can still perform to their original specifications, as demonstrated by successful pressure testing. It offers a tangible connection to Omega's heritage in aquatic timekeeping.

Collector Discussions

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Omega's new Observatory Collection features various models with different case dimensions and dial designs. The watches are Master Chronometer certified and come with different calibre movements. Models include Platinum, Canopus Gold, Steel, and Moonshine Gold.
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Omega Seamaster Planet Ocean 600M Vs. Rolex Submariner Ref. 124060
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Omega Plo Prof: A Wrist Shot.
Nicolas is torn as his beloved Omega Plo Prof is being repaired, reflecting on his attachment to the timepiece.
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Evolution: The 4th Generation Seamaster 600 Planet Ocean
Omega's 4th Generation Seamaster 600 Planet Ocean boasts modern luxury with ceramic bezel variations, a polished case, and practical micro-adjustments. It combines elegant design with a departure from traditional tool watch functionality.
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Omega Seamaster 1000m “Grand” (ref. 166.093) – destro configuration, advice on preservation & authentication
Seeking guidance on vintage Omega Seamaster 1000m 'Grand'. Watch from 1970s, advice on not opening due to complex case construction. Questions on authentication, specialists, preserving originality without opening case.
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Omega Seamaster 300 007, the modern one.
Nicolas shares admiration for the Omega Seamaster 300 007 as a top modern re-edition choice among Seamaster models in this forum post.
forum · amanico · 2565 views · 1M

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