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

Reference 2812.52.31

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

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.

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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

2025 Omega AT Railmaster Grey on Bracelet - Full Kit

Omega - 235.10.38.20.06.001 · $5,299

Up for sale is Omega's newest version of the Railmaster in grey, featuring an in-house automatic Co-Axial Master Chronometer Calibre 8806 with a 55-hr power reserve.

Condition: near-mint
Case Dimension: 38 mm diameter
Lug Width: 19 mm
Thickness: 12.4 mm

Posted at

Oct 26, 2025, 5:41 PM

Active

View listing on r/WatchExchange

Omega Railmaster 2503.52 (39.2mm) Full Set

Omega - 2503.52 · $3,150

39.2mm Railmaster with Cal. 2403 movement and 44HRs power reserve.

Condition: Great condition, no service history
Case Diameter: 39.2mm
Thickness: 11mm
Lug To Lug: 47mm

Posted at

Oct 24, 2025, 9:53 AM

Active

View listing on r/WatchExchange

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

Omega - 2804.52.37 · $5,301

The Omega Railmaster is an iconic watch with a no-nonsense dial design that has remained largely unchanged since 1957.

Condition: recently serviced
Case size: 36mm
Dial type: 3-6-9

Posted at

Oct 23, 2025, 10:17 AM

Active

View listing on r/WatchExchange

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

Omega - 220.10.40.20.03.001 · $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