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

Reference 2802.52.31

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

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.
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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 Railmaster 36mm 2804.52.37 | Original Tags & Cards (serviced)

Omega Railmaster 36mm 2804.52.37 | Original Tags & Cards (serviced)

Omega - 2804.52.37 路 $5,301
The Omega Railmaster is an iconic watch with a no-nonsense 3-6-9 dial, designed to be practical and modest compared to other luxury watches.

  • Condition: Serviced
  • Diameter: 36mm
Posted at
Feb 21, 2026, 9:09 AM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Railmaster 40mm Ref. 220.12.40.20.03.001

Omega Seamaster Railmaster 40mm Ref. 220.12.40.20.03.001

Omega - 220.12.40.20.03.001 路 $3,800
This Omega Seamaster Railmaster features a blue gradient dial and is certified as a Master Chronometer by METAS.

  • Condition: Excellent overall condition
  • Case size: 40mm diameter
  • Case material: Stainless steel
  • Dial color: Blue gradient
Posted at
Feb 15, 2026, 9:16 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Railmaster XXL 49.2mm Watch Only

Omega Seamaster Railmaster XXL 49.2mm Watch Only

Omega - 2806.52.37 路 $3,500
Omega Seamaster Railmaster XXL watch, purchased from Watchesmiles just over a month ago.

  • Condition: great condition
  • Case Size: 49.2mm diameter
Posted at
Feb 13, 2026, 7:12 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Railmaster XXL 49.2mm

Omega Seamaster Railmaster XXL 49.2mm

Omega - Railmaster XXL
This listing does not contain a description of the watch.

  • Size: 49.2mm diameter
Posted at
Feb 13, 2026, 2:56 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Railmaster XXL 49.2mm

Omega Seamaster Railmaster XXL 49.2mm

Omega - Railmaster XXL 路 $3,500
A large Omega Seamaster Railmaster model with a unique design, sold as is without original packaging or documentation.

Posted at
Feb 13, 2026, 2:55 PM
Active
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[WTS] [Price Reduced] Omega Railmaster Silver 220.10.40.20.06.001 2023 Full Set Like New under omega warranty till 2028 - $2999 + 馃彿 馃敟

[Price Reduced] Omega Railmaster Silver 220.10.40.20.06.001 2023 Full Set Like New under omega warranty till 2028 - $2999 + 馃彿 馃敟

Omega - 220.10.40.20.06.001 路 $2,999
This is a discontinued Omega Railmaster model that's hard to find in this condition and still under warranty till 2028.

  • Condition: Like new
  • Warranty Expiration Date: 2028
  • Set Contents: Full set, half links, 3 Omega cards
Posted at
Feb 13, 2026, 12:39 PM
Active
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[WTS] Omega Railmaster 36mm 2804.52.37 | Original Omega certificates (serviced)

Omega Railmaster 36mm 2804.52.37 | Original Omega certificates (serviced)

Omega - 2804.52.37 路 $5,301
The Omega Railmaster is an iconic watch with a no nonsense 3-6-9 dial, making it practical and modest compared to the Rolex Explorer. Its design has remained relatively unchanged since 1957.

  • Condition: serviced
  • Diameter: 36mm
  • Certificates: original
  • Shipping Us: 52
Posted at
Feb 12, 2026, 9:08 AM
Active
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Omega Railmaster - 220.10.40.20.03.001 - Blue - Steel - 40mm - Mint

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

Omega - 220.10.40.20.03.001 路 $3,795
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
View listing on RolexForums
NO TRADES: Omega '57 Trilogy Railmaster. $5030

NO TRADES: Omega '57 Trilogy Railmaster. $5030

Omega - '57 Trilogy Railmaster 路 $5,030
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
View listing on RolexForums