Omega Railmaster Seamaster Aqua Terra 150M Automatic 42.2 Railmaster Chronograph / Black Alligator

Reference 2812.52.31

About this watch

The Omega Seamaster Aqua Terra 150M Automatic 42.2 Railmaster Chronograph is a masterpiece of elegance and functionality combined. Its sleek design and robust features cater to both the adventurous spirit and the connoisseur's taste. The black alligator leather strap adds sophistication, while the stainless steel case exudes durability. The round shape and 42.20 mm diameter give it a commanding presence on the wrist. The dial shines with mixed indexes and arrow-shaped hands against a striking black background. The chronograph feature allows for precision timing, making it a joy to use. With a column wheel mechanism, this self-winding movement boasts a frequency of 28,800 vibrations per hour and a power reserve of 55 hours, ensuring accuracy and reliability. The 150m water resistance rating means it's built to handle any situation. This watch is not just a statement piece but also a companion that's perfect for both casual day outs and formal evening events.
Buy Now on Jomashop
This is an affiliate link

Key Features

  • Stainless Steel Case
  • Sapphire Crystal
  • Omega Caliber 3205 Movement
  • 150m Water Resistance
  • Chronograph Function
  • Column Wheel Mechanism
  • Black Alligator Leather Strap

Specifications

Brand
Omega
Family
Railmaster
Model
Seamaster Aqua Terra 150M Automatic 42.2 Railmaster Chronograph / Black Alligator
Reference
2812.52.31
Movement
3205
Movement Features
  • Hours, Minutes, Small Seconds
  • Chronograph, Column wheel
Case
Stainless Steel 42.2mm
Dial Color
Black
Crystal
Sapphire
Water Resistance
150

Current Listings

[WTS] Omega Seamaster Aqua Terra Railmaster 2504.52 — $6800— Catch & Release, Serviced by Omega, Full Set

Omega Seamaster Aqua Terra Railmaster 2504.52 — $6800— Catch & Release, Serviced by Omega, Full Set

Omega - 2504.52 · $6,800
This Omega Seamaster Aqua Terra Railmaster is a 36mm stainless steel watch featuring a black dial, automatic movement, and an Omega 1575 stainless steel bracelet.

  • Condition: Excellent, minimal wear
  • Case material: Stainless steel
  • Diameter: 36mm
  • Lug width: 19mm
Posted at
Apr 22, 2026, 12:40 AM
Active
[WTS] Omega Seamaster Railmaster, Grey/Silver, 40mm (full set- box and papers)

Omega Seamaster Railmaster, Grey/Silver, 40mm (full set- box and papers)

Omega - Railmaster · $3,200
A sleek and sporty GADA watch that has a lot to offer under the hood. It's a stealth ultimate tool watch that cleans up nicely.

  • Condition: excellent, pre-owned with minor signs of wear
  • Case size: 40mm
  • Serial number available: true
Posted at
Apr 21, 2026, 12:25 AM
Active
[WTS] Omega Seamaster Railmaster Grey Dial

Omega Seamaster Railmaster Grey Dial

This Omega Railmaster has a 38mm steel case on a steel bracelet with a gray gradient dial, and includes a full set of accessories.

  • Condition: Excellent pre-owned condition
  • Case size: 38mm diameter
  • Bracelet material: steel
  • Dial color: gray gradient
Posted at
Apr 19, 2026, 4:38 PM
Active
[WTS] Omega Railmaster 39mm 2503.52 for $2580 shipped!

Omega Railmaster 39mm 2503.52 for $2580 shipped!

Omega - 2503.52 · $2,580
The Omega Seamaster Railmaster 39mm delivers a simple design with its 3-6-9-12 markers and arrow indices, making it the ultimate everyday watch.

  • Condition: Satisfactory
  • Case Size: 39mm
  • Lug To Lug: 47mm
  • Movement Type: No Date Co-Axial Automatic
Posted at
Apr 19, 2026, 11:02 AM
Active
[WTS] Omega Railmaster Denim Dial on Bracelet - Omega Travel Box & Extra Strap Included - $2475

Omega Railmaster Denim Dial on Bracelet - Omega Travel Box & Extra Strap Included - $2475

A versatile Omega Railmaster Denim Dial on a bracelet with 150M water resistance and a 40mm case size that wears well. The watch is in good condition with minor signs of wear.

  • Condition: Used, minimal wear
  • Case diameter: 40mm
  • Water resistance: 150m
  • Bracelet size: 7-7.25 inch
Posted at
Apr 19, 2026, 8:55 AM
Active
[WTS] 2022 OMEGA Seamaster Railmaster 40mm - 220.10.40.20.01.001 - Full Set

2022 OMEGA Seamaster Railmaster 40mm - 220.10.40.20.01.001 - Full Set

A classic design by Omega, the Seamaster Railmaster 40mm features a vertical 'satination' pattern crosshair dial with fantastic lume, and comes as a full set from 2022.

  • Condition: Excellent pre-owned condition with minor visible wear throughout
  • Case Size: 40mm diameter
  • Movement: Omega 8806
Posted at
Apr 14, 2026, 8:32 PM
Active
[WTS] Omega Railmaster Grey Dial on Staib Mesh Bracelet & OEM Clasp on Rubber Strap

Omega Railmaster Grey Dial on Staib Mesh Bracelet & OEM Clasp on Rubber Strap

Omega - 22010402006001 · $2,625
This Omega Railmaster is a rugged, anti-magnetic watch designed for everyday use. It features a grey brushed dial and a high-quality Staib mesh bracelet.

  • Bracelet Size Range: up to 7.5 inches loose
  • Movement Type: co-axial master chronometer
Posted at
Apr 13, 2026, 5:35 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