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

[WTS] Omega Seamaster Railmaster 39mm - 2503.52

Omega Seamaster Railmaster 39mm - 2503.52

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

  • Condition: good, has light wear on bezel, bracelet, and clasp
  • Movement: caliber 2403
  • Case diameter: 39mm
  • Bracelet size compatible: up to 7.5 inch wrist
Posted at
Apr 8, 2026, 6:45 PM
Active
[WTS] Tudor Ranger 39 & Omega Railmaster; Gorgeous Field Watch Duo

Tudor Ranger 39 & Omega Railmaster; Gorgeous Field Watch Duo

Tudor - Ranger 39 · $2,450
A Tudor Ranger 39 and an Omega Railmaster field watch duo are being sold. The Tudor is in excellent condition, while the Omega has minor hairlines but a perfect crystal.

  • Condition: Excellent
  • Bracelet size range: 7.75"
  • Band type 1: OEM bracelet
  • Band type 2: Staib mesh bracelet
Posted at
Apr 6, 2026, 10:46 PM
Active
[WTS] Omega Railmaster 39mm 2503.52 for $2680 shipped!

Omega Railmaster 39mm 2503.52 for $2680 shipped!

Omega - 2503.52 · $2,680
The Omega Seamaster Railmaster 39mm 2503.52 is a simple design watch with a no-date co-axial movement, suitable for everyday wear.

  • Condition: Satisfactory, with signs of long-term usage
  • Movement: Omega Calibre 2403 No Date Co-Axial Automatic
  • Case dimensions: 39mm wide, 47mm lug to lug
  • Chips/scratches: case is chipped on the left side, light scratches and surface marks throughout case and bracelet, scratches on bezel and crystal
Posted at
Apr 4, 2026, 10:46 AM
Active
[WTS] Omega Railmaster 39mm – Full Set – $2,650

Omega Railmaster 39mm – Full Set – $2,650

Omega - Railmaster 39mm · $2,650
A great everyday Omega Railmaster 39mm in excellent condition, perfect for casual wear due to its clean and understated design.

  • Condition: Overall very good with minor lugs finish issue
  • Lug finish: brushed
  • Issue description: slight bleeding from previous polish
Posted at
Mar 30, 2026, 1:43 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