Omega Seamaster Diver 300M Summer Blue Box Papers Ready to Ship, 210.30.42.20.03.003

Offered is a Omega Seamaster Diver 300m "Summer Blue" reference 210.30.42.20.03.003 in Very Good Pre-Owned condition, with Box and Papers.

The Seamaster Diver 300M "Summer Blue" represents one of the more deliberate colorway executions in Omega's modern tool-watch lineup, pairing a graduated tropical-blue dial with a matched ceramic bezel insert in a combination that differentiates it cleanly from the standard black and Professional Blue references. Reference 210.30.42.20.03.003 is the bracelet configuration, which collectors consistently prefer over the rubber strap variant for its integrated wear and daily versatility. This generation of the Seamaster 300M, introduced in 2018, marked Omega's full transition to in-house Master Chronometer movements across the line, a specification point that materially separates it from earlier ETA-based predecessors. The bracelet execution also speaks to completeness, a matched-metal presentation that holds better long-term value than strap variants.

This reference is powered by the Calibre 8800, Omega's in-house co-axial movement beating at 3.5 Hz with a 55-hour power reserve. The calibre holds METAS Master Chronometer certification, meaning it has been independently verified to perform within 0/+5 seconds per day and resist magnetic fields exceeding 15,000 gauss, a practical durability standard no COSC certification alone provides. The movement incorporates Omega's free-sprung balance with silicon hairspring, contributing to both antimagnetic performance and long-term rate stability. Finishing is production-grade rather than haute horlogerie, consistent with a professional diver's tool brief.

The case is 42mm stainless steel with a unidirectional rotating bezel set with a blue ceramic insert and white enamel diving scale, water-resistant to 300 metres via a helium escape valve and screw-down crown. The dial presents a graduated "Summer Blue" sunburst lacquer surface with applied luminous indexes and a date window at six o'clock; the wave-pattern texture is absent on this reference in favor of the cleaner lacquered finish. The bracelet is Omega's five-link stainless steel design with a folding clasp and diver's extension, sized to fit over a wetsuit and offering a secure deployment mechanism for everyday wear. Brushed and polished surface finishing is distributed across the case flanks and bracelet links in a manner consistent with Omega's current production standards for the line.

Details:
- Brand: Omega
- Model: Seamaster Diver 300m "Summer Blue"
- Reference: 210.30.42.20.03.003

Condition:
- Very Good Pre-Owned condition
- Fully functional

Included:
- Box and Papers

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