The Omega Seamaster Railmaster in reference 220.10.40.20.01.001 is a modern reinterpretation of one of Omega's most historically significant models — originally launched in 1957 as a companion to the Seamaster 300 and Speedmaster, and designed specifically to resist magnetic fields. Today's Railmaster carries that legacy forward with a clean, purposeful aesthetic and Omega's cutting-edge Master Chronometer-certified movement technology.

The 40mm stainless steel case is elegantly proportioned at just 12.6mm thick with a 46.5mm lug-to-lug span, making it one of the most wearable watches in the Seamaster family. The bold black dial presents hours, minutes, and seconds in a no-date configuration — a deliberate nod to the purity of the original 1957 design. The stainless steel bracelet with folding buckle completes a cohesive, dressy-sport look.

Power comes from Omega's in-house Caliber 8806, a 35-jewel automatic running at 25,200vph with a 55-hour power reserve, protected by a sapphire crystal and rated to 15 ATM (150 metres). This 2021 example is in very good pre-owned condition and is offered complete with original Omega box and papers.
 

Basic Information: 

• Brand: Omega
• Model: Seamaster Railmaster
• Reference Number: 220.10.40.20.01.001
• Year: 2021
• Condition: Pre‑owned, very good
• Scope of Delivery: Watch, box and papers
• Gender: Men’s / Unisex
• Caliber
• Movement: Automatic
• Caliber: Omega 8806 (META‑Certified Co‑Axial)
• Power Reserve: 55 hours
• Frequency: 25,200 vph
• Jewels: 35
• Functions: Hours, Minutes, Seconds
• Case
• Case Material: Stainless steel
• Bezel Material: Stainless steel
• Diameter: 40 mm
• Thickness: 12.6 mm
• Lug‑to‑Lug: 46.5 mm
• Crystal: Sapphire
• Dial: Black
• Water Resistance: 15 ATM (150 m)
• Bracelet/Strap
• Bracelet Material: Stainless steel
• Clasp: Folding buckle

Key features: 

• Reissue of Omega's iconic 1957 Railmaster — no-date, pure 3-hand configuration
• Slim, wearable proportions — 40mm diameter, 12.6mm thick, 46.5mm lug-to-lug
• In-house Caliber 8806 automatic — 35 jewels, 55-hour power reserve, 25,200vph
• Stainless steel case, bezel, and integrated bracelet with folding buckle
• Black dial with sapphire crystal — clean, legible, timeless
• Water resistant to 15 ATM (150 metres)
• Complete with original Omega box and papers (2021)