Omega Railmaster Seamaster Aqua Terra 150M Co-Axial 36.2 Railmaster / Bracelet

Reference 2504.52.00

Omega Seamaster Aqua Terra 150M Co-Axial 36.2 Railmaster / Bracelet

About this watch

The Omega Seamaster Aqua Terra 150M Co-Axial 36.2 Railmaster is a sophisticated piece of horology that combines elegance, functionality, and cutting-edge technology. Its round stainless steel case strikes a balance between boldness and understated elegance, while the sleek black dial creates a striking contrast that makes the watch both sporty and sophisticated. At the heart of this timepiece is the Omega caliber 2403, a version of the renowned caliber 2500, featuring a Co-Axial escapement that reduces friction and enhances accuracy. With a power reserve of 48 hours and a frequency of 25,200 vibrations per hour, this automatic movement is designed to keep you on time. Whether you're diving into the deep blue sea or attending a formal event, this watch won't let you down. Its chronometer certification ensures that it meets stringent accuracy standards, making it a reliable companion in any situation. With a water resistance rating of 150 meters, the Seamaster Aqua Terra is built for aquatic adventures and features a comfortable fit with its 36.2 mm case size, making it a versatile choice for diverse wrist sizes.

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MSRP: $2,980

Market Price: $4,063

Key Features

Round stainless steel case
Omega caliber 2403 movement
Co-Axial escapement
Chronometer certification
Water resistance up to 150 meters
Comfortable fit with 36.2 mm case size
Sleek black dial with mixed indexes

Specifications

Brand

Omega

Family

Railmaster

Model

Seamaster Aqua Terra 150M Co-Axial 36.2 Railmaster / Bracelet

Reference

2504.52.00

Movement

2403

Movement Features

Hours, Minutes, Seconds
Co-Axial Escapement, Chronometer

Case

Stainless Steel 36.2mm

Dial Color

Black

Crystal

Sapphire

Water Resistance

150

Current Listings

Omega Seamaster Railmaster Grey Dial

Omega - 235.10.38.20.06.001 · $4,499

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

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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

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

Omega - Railmaster Denim Dial · $2,475

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

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Omega Seamaster Railmaster 39mm - 2503.52- Price Reduced

Omega - 2503.52 · $2,950

For sale is this amazing Omega Railmaster featuring a mechanical, self-winding movement with co-axial escapement and exhibition case back.

Condition: good, light wear on bezel, bracelet, and clasp
Movement: caliber 2403
Case diameter: 39mm

Posted at

Apr 18, 2026, 12:54 PM

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2022 OMEGA Seamaster Railmaster 40mm - 220.10.40.20.01.001 - Full Set

Omega - 220.10.40.20.01.001 · $3,100

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

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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

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Omega Seamaster Railmaster 40mm[WTS]

Omega - Railmaster · $3,300

A great first watch for any enthusiast, stainless steel brushed bracelet and bezel and case. No dent nor dings.

Condition: Great condition
Bracelet length: 40mm diameter

Posted at

Apr 12, 2026, 12:50 AM

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Omega Railmaster 235.10.38.20.06.001 - under warranty until 2031

Omega - 235.10.38.20.06.001 · $4,499

This Omega Railmaster features a 38mm steel case on a steel bracelet with a gray gradient dial and has a warranty until 2031.

Condition: Excellent pre-owned condition
Case size: 38mm diameter
Bracelet material: steel
Dial color: gray gradient

Posted at

Apr 9, 2026, 9:54 AM

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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

View listing on r/WatchExchange