Omega Railmaster Seamaster Aqua Terra 150M Co-Axial 42.2 Railmaster / Black Alligator

Reference 2802.52.31

About this watch

The Omega Seamaster Aqua Terra 150M Co-Axial 42.2 Railmaster / Black Alligator (model 2802.52.31) is a luxury timepiece that embodies precision and innovation, blending the sporty essence of the Railmaster with the elegance of a dress watch. Crafted from high-quality stainless steel, the case feels robust and durable, featuring a sapphire crystal that's scratch-resistant and an open case back revealing the intricate movement inside. This automatic movement, Omega's caliber 2403, is designed for accuracy and reliability, with a Co-Axial escapement reducing friction and increasing longevity. With a power reserve of 48 hours, you can comfortably take this watch off for a weekend without worrying about winding it. The precision is top-notch, ensuring you're always on time. This watch is surprisingly lightweight, making it perfect for all-day wear. The black alligator strap adds a touch of sophistication, making it versatile enough for both formal and casual settings. Whether you're in a suit or a casual t-shirt, the Omega Seamaster Aqua Terra 150M Co-Axial enhances your style without being overpowering. With its timeless design, reliable movement, and versatility, it's an investment that will serve you well for years to come.
Buy Now on Jomashop
This is an affiliate link
MSRP: $2,900
Market Price: $2,594

Key Features

  • Omega caliber 2403 automatic movement
  • Sapphire crystal scratch-resistant
  • Water resistance up to 150 meters
  • 42.2 mm diameter stainless steel case
  • 48-hour power reserve
  • Co-Axial escapement for increased longevity

Specifications

Brand
Omega
Family
Railmaster
Model
Seamaster Aqua Terra 150M Co-Axial 42.2 Railmaster / Black Alligator
Reference
2802.52.31
Movement
2403
Movement Features
  • Hours, Minutes, Seconds
  • Co-Axial Escapement, Chronometer
Case
Stainless Steel 42.2mm
Dial Color
Black
Crystal
Sapphire
Water Resistance
150

Current Listings

[WTS] Omega Seamaster Railmaster 40 mm, steel on steel - 2,599 USD

Omega Seamaster Railmaster 40 mm, steel on steel - 2,599 USD

A 40mm steel Omega Seamaster Railmaster, with a METAS-certified movement and 15 Bar water resistance.

  • Condition: Mint – Worn Twice
  • Case Size: 40mm diameter
  • Lug To Lug: 47mm
  • Thickness: 12.7mm
Posted at
Oct 21, 2025, 3:34 AM
Active
[WTS] Omega Railmaster

Omega Railmaster

Recently discontinued Omega Seamaster Railmaster, includes full kit and undated warranty card.

  • Case Mark: small mark near 1 o'clock
  • Shipping Method: FedEx 2 Day
Posted at
Oct 18, 2025, 11:54 AM
Active
[WTS] Omega Railmaster 39mm - 2503.52

Omega Railmaster 39mm - 2503.52

Omega - 2503.52 · $2,995
The Omega Railmaster 39mm features a mechanical, self-winding movement (caliber 2403) with co-axial escapement and an exhibition case back.

  • Condition: really nice condition
  • Movement: caliber 2403
  • Bracelet size range: 7-7.25 inch
  • Case polish: light polish
Posted at
Oct 15, 2025, 9:21 PM
Active
Omega Railmaster  - 220.10.40.20.03.001 - Blue - Steel - 40mm - Mint

Omega Railmaster - 220.10.40.20.03.001 - Blue - Steel - 40mm - Mint

This Omega Railmaster is a pre-owned, mint condition watch with a blue dial and stainless steel case. It has a 40mm diameter and features an automatic movement.

  • Condition: Pre-Owned - Mint
  • Case Size: 40mm diameter
  • Bracelet Type: Stainless Steel
  • Movement Type: Automatic
Posted at
Mar 10, 2025, 12:58 AM
Active
NO TRADES:  Omega '57 Trilogy Railmaster.      $5030

NO TRADES: Omega '57 Trilogy Railmaster. $5030

A brand new Omega '57 Trilogy Railmaster purchased in September 2024.

  • Condition: Light scratches
  • Bracelet condition: light scratches on bracelet and clasp
  • Warranty: USA only
Posted at
Mar 7, 2025, 1:00 PM
Active