Omega Railmaster Railmaster Omega Co-Axial Master Chronometer 40 Stainless Steel / Blue / NATO

Reference 220.12.40.20.03.001

About this watch

The Omega Railmaster 220.12.40.20.03.001 is a masterpiece of engineering, boasting a stunning blue dial with a matte finish that exudes sophistication and elegance. Its 40mm diameter strikes the perfect balance between boldness and refinement, while the stick and dot indexes enhance visibility without compromising the minimalist aesthetic. Equipped with a sapphire crystal, this watch is both scratch-resistant and durable enough for daily wear. At its core lies the Omega caliber 8806, a self-winding movement that's a testament to precision and reliability. With a power reserve of 55 hours and Master Chronometer certification, this watch performs exceptionally well under various conditions, including magnetic fields up to 15,000 gauss. The Co-Axial escapement reduces friction between parts, leading to greater accuracy and longevity. Whether you're in the boardroom or on the beach, this watch is a reliable companion that checks all the boxes for style, performance, and heritage.
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MSRP: $5,400
Market Price: $2,431

Key Features

  • Omega caliber 8806 self-winding movement
  • Sapphire crystal for scratch resistance and durability
  • Master Chronometer certification for exceptional accuracy
  • Co-Axial escapement for reduced friction and increased longevity
  • 150m water resistance for swimming, snorkeling, or rainy days
  • 40mm diameter with 12.65mm height and 20mm lug width for comfortable wear

Specifications

Brand
Omega
Family
Railmaster
Model
Railmaster Omega Co-Axial Master Chronometer 40 Stainless Steel / Blue / NATO
Reference
220.12.40.20.03.001
Movement
8806
Movement Features
  • Hours, Minutes, Seconds
  • Chronometer, Co-Axial Escapement
Case
Stainless Steel 40mm
Dial Color
Blue
Crystal
Sapphire
Water Resistance
150

Current Listings

[WTS] Omega Railmaster 40mm Full set, warranty until 2028 220.10.40.20.06.001

Omega Railmaster 40mm Full set, warranty until 2028 220.10.40.20.06.001

This Omega Railmaster features a 40mm case with a lug width of 20mm, making it suitable for most wrist sizes and easy to change straps.

  • Condition: great condition
  • Case size: 40mm
  • L2l: 47mm
  • Lug width: 20mm
Posted at
Jan 31, 2026, 8:16 PM
Active
[WTS] Omega Railmaster 36mm

Omega Railmaster 36mm

Omega - 2804.52.37 · $6,700
A 36mm Omega Railmaster in very good condition, featuring a leather band and deployant clasp, along with a period correct bracelet.

  • Condition: Very good condition but shows signs of scratches and wear commensurate with age
  • Box: Inner and outer box included
  • Warranty Card: Warranty card included
  • Bracelet Size: 6 1/4 inch wrist size, adjustable with extra links
Posted at
Jan 29, 2026, 8:50 PM
Active
[WTS] Omega Railmaster Full set, warranty until 2028 220.10.40.20.06.001

Omega Railmaster Full set, warranty until 2028 220.10.40.20.06.001

This Omega Railmaster is a 40mm watch with a 47 L2L and 20mm lug width, making it suitable for everyday use.

  • Condition: great condition
  • Diameter: 40mm
  • Lug width: 20mm
  • Case length to lug: 47 L2L
Posted at
Jan 23, 2026, 5:24 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