Omega Seamaster 120m Ref. 2511.31 (Quartz)
Dive Watch / Luxury Sports Watch · Omega (Swatch Group), Luxury Tier
Period: Neo-Vintage / 1990s Modern Luxury
Type
Dive Watch / Luxury Sports Watch
Brand
Omega (Swatch Group), Luxury Tier
Movement
Omega Caliber 1538 high-precision quartz movement with thermo-compensation features and end-of-life (EOL) indicator
Dimensions
Case diameter: 36mm, Case thickness: 10mm, Lug-to-lug: 43mm, Lug width: 18mm
Description
The Omega Seamaster 120m bridges the gap between a robust tool watch and an elegant everyday luxury timepiece. With its versatile 36mm case, striking sunburst dial, and distinctive sword hands, it offers a more understated and refined alternative to its heavier-duty professional Seamaster 300m siblings. Driven by a reliable high-grade quartz movement, it is designed for effortless daily wear and timeless sporty elegance.
Key Features
Distinctive 36mm mid-size case profile, fixed bezel design, recognizable Omega sword hands, applied Arabic numerals at the quarters, and the iconic Seamaster Seahorse case back engraving
Dial Description
Dark charcoal/black sunburst dial with applied luminous baton indices, prominent Arabic numerals at 6, 9, and 12, sword hands with luminous inserts, a central seconds hand, and a white date window positioned at 3 o'clock
Case Material
Stainless steel (316L) with high-polish bezel and brushed case sides
Crystal Type
Flat scratch-resistant sapphire crystal with anti-reflective coating on the interior
Bezel Details
Fixed smooth polished stainless steel bezel, rounded profile
Crown & Pushers
Signed screw-down crown with the Omega logo and protective crown guards integrated into the case design
Bracelet or Strap
Multi-link stainless steel 'Seamaster' bracelet featuring alternating polished and brushed links, secured with a fold-over deployant clasp
Caseback Details
Solid stainless steel screw-down case back embossed with the iconic Omega Seamaster Seahorse/Hippocampus medallion
Movement Type
Omega Caliber 1538 high-precision quartz movement with thermo-compensation features and end-of-life (EOL) indicator
Water Resistance
120 meters (400 feet) / 12 ATM, suitable for swimming, snorkeling, and recreational water sports, but not professional saturation diving
Origin & Provenance
Swiss Made, manufactured in Bienne, Switzerland
Age Estimate
Circa mid-to-late 1990s (approx. 1995-2000)
Cultural Significance
Represents the height of 1990s Omega design language, maintaining the rugged heritage of the Seamaster collection while embracing slimmer, more versatile everyday luxury proportions.
Condition Notes
Very Good condition overall. The case shows minor hairline scratches consistent with light wear, particularly on the polished bezel. The crystal remains clean and free of major blemishes. The dial and handset are pristine with strong lume application. The bracelet shows moderate signs of use but maintains structural integrity.
Value Estimate
Estimated secondary market value ranges between $1,000 and $1,800 USD, depending on condition, presence of original box and papers, and recent service history.
Care & Maintenance
Recommended battery replacement every 2 to 3 years with simultaneous pressure testing and gasket inspection to ensure water resistance. Avoid exposure to strong magnetic fields and have professional servicing performed by an authorized watchmaker every 5 to 7 years.
Similar Watches
Omega Seamaster Professional 300m Mid-size (features a rotating dive bezel), Tag Heuer 2000 Series, Rolex Datejust 36 (dressier alternative)
Interesting Facts
The Seamaster 120m line was popularized in the 1990s as a versatile sports watch that could easily transition from deep-sea excursions to formal black-tie events. It shares design DNA with the famous Seamaster Professional series worn by James Bond during that era.