Omega Railmaster Seamaster Aqua Terra 150M Co-Axial 39.2 Railmaster Yellow Gold / Black Alligator

Reference 2603.52.31

About this watch

The Omega Seamaster Aqua Terra 150M Co-Axial 39.2 Railmaster in Yellow Gold and Black Alligator is a stunning timepiece that beautifully marries elegance and functionality. The watch features a round shape with a diameter of 39.20 mm, crafted from stunning yellow gold, and a black alligator leather strap adding sophistication. The Omega caliber 2403 movement boasts Co-Axial escapement and chronometer certification, ensuring exceptional accuracy and reliability. With its superior craftsmanship, timeless design, and impressive movement, this watch is not just a timepiece but a legacy. Whether you're looking for a statement piece or a reliable watch for everyday wear, the Omega Seamaster Aqua Terra checks all the boxes.
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Key Features

  • Omega Caliber 2403 Co-Axial Escapement
  • Chronometer Certified Movement
  • 150 Meter Water Resistance
  • Yellow Gold Case and Black Alligator Strap
  • Sapphire Crystal for Scratch Protection
  • 48-Hour Power Reserve
  • Automatic Movement with Hours, Minutes, and Seconds

Specifications

Brand
Omega
Family
Railmaster
Model
Seamaster Aqua Terra 150M Co-Axial 39.2 Railmaster Yellow Gold / Black Alligator
Reference
2603.52.31
Movement
2403
Movement Features
  • Hours, Minutes, Seconds
  • Co-Axial Escapement, Chronometer
Case
Yellow Gold 39.2mm
Dial Color
Black
Crystal
Sapphire
Water Resistance
150

Current Listings

Omega Seamaster Railmaster Brand New stickered Full Set Open Card [WTS]

Omega Seamaster Railmaster Brand New stickered Full Set Open Card

The Omega Seamaster Railmaster is a steel watch with a grey dial and chronometer/Co-axial self-winding mechanical movement, powered by the Caliber 8806 and featuring a 44mm diameter case.

  • Condition: Brand New
  • Movement type: chronometer/Co-axial self-winding mechanical movement
  • Case diameter: 44 MM
  • Dial color: Grey
Posted at
Dec 10, 2025, 7:09 PM
Active
[WTS] (2021) Mint Omega Seamaster Railmaster 40mm Grey Dial 220.10.40.20.06.001 $2,600

(2021) Mint Omega Seamaster Railmaster 40mm Grey Dial 220.10.40.20.06.001 $2,600

This Omega Seamaster Railmaster is a 2021 model with a grey dial and 40mm case size, offered for sale in full set condition including box and papers.

  • Condition: lightly used with very little signs of use
  • Case size: 40mm diameter
  • Year: 2021
  • Condition notes: very little signs of use
Posted at
Dec 6, 2025, 11:54 PM
Active
[WTS] Omega Railmaster 36mm 2804.52.37 | Original Box & Papers (serviced)

Omega Railmaster 36mm 2804.52.37 | Original Box & Papers (serviced)

Omega - 2804.52.37 · $5,301
Up for sale is the iconic Omega Railmaster (36mm) 2804.52.37, featuring a no nonsense 3-6-9 dial and practical design compared to the Rolex Explorer.

  • Condition: Serviced, with original box and papers
  • Diameter: 36mm
Posted at
Dec 4, 2025, 9:30 AM
Active
[WTS] Omega Railmaster Black Dial on Delugs CTS Rubber

Omega Railmaster Black Dial on Delugs CTS Rubber

Omega - 22010402001001 · $2,699
The Omega Railmaster is a robust and rugged engineer's watch, available in this 40mm Black Dial version. It features a co-axial master chronometer movement and comes with the full kit minus warranty.

  • Condition: very good, with minor wear (8/10)
  • Strap included: Delugs CTS black rubber strap with deployment ($145 value)
  • Lug wear: minor
  • Back of lugs condition: mostly worn
Posted at
Dec 3, 2025, 6:46 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