Omega Seamaster Railmaster Ref. 220.10.40.20.06.001

Omega Seamaster Railmaster

The original OMEGA Railmaster of 1957 was a simple, practical, yet elegant watch designed for railway staff or anyone who worked close to electrical fields. Today, that spirit of innovation has been carried over into an updated model which enhances the Railmaster’s capabilities yet again.

The 40mm symmetrical case is made from stainless steel with a wave-edged design featured on the back. The vertically brushed grey dial includes brushed stainless steel hands and recessed hour-markers which are all filled with “vintage” Super-LumiNova. There is also a transferred beige “Railmaster” indication which delivers a classic touch.

The watch has a fully brushed and integrated stainless steel bracelet and the oriented caseback features a NAIAD LOCK design (patent pending) to keep the wording upright. The watch is driven by the OMEGA Co-Axial Master Chronometer Calibre 8806. Certified at the industry’s highest standard by the Swiss Federal Institute of Metrology (METAS) and able to withstand magnetism of 15,000 gauss, this Railmaster model recalls the superb anti-magnetic qualities of its predecessor.

Technical Data 
Reference 
220.10.40.20.06.001 
Between lugs Open Case Measurement Modal 
20 mm 
Lug‑to‑lug Open Case Measurement Modal 
47.0 mm 
Thickness Open Case Measurement Modal 
12.7 mm 
Case diameter Open Case Measurement Modal 
40 mm 
Case 
Steel 
Dial colour 
Grey 
Crystal 
Domed scratch‑resistant sapphire crystal with anti‑reflective treatment on both sides 
Water resistance 
15 bar (150 metres / 500 feet) 
Total product weight (approx.) 
149 g 
Calibre 
Omega 8806 
Movement Type 
Self winding 
Power reserve 
55 hours

Bracelet 
Material 
Steel 
Type of Clasp 
Butterfly clasp