The original OMEGA Railmaster was launched in 1957 for professionals working on the railways. For this modern update, OMEGA has retained that same timeless look while updating the design with a new colour and a modern standard of precision.

The symmetrical 38 mm case is brushed and polished, and is presented on a golden brown Novonappa leather strap. In keeping with the original Railmaster’s easy-to-read display, the dial of this model is beige with a black gradient, and features large numerals and hour markers in vintage Super-LumiNova. There is also a Small Seconds display placed at 6 o’clock, which includes a beige varnished hand.

This watch continues the Railmaster’s legacy of anti-magnetism, courtesy of the Co-Axial Master Chronometer Calibre 8804. The movement is resistant to magnetism up to 15,000 gauss, and can be viewed through the transparent sapphire crystal on the caseback.

Features
Anti-magnetic: The movement is unaffected by exposure to strong magnetic fields, even those greater than 1.5 tesla (15,000 gauss).
Chronometer: Label given to a watch which has been successfully tested by an accredited and independent laboratory in order to receive a certificate compliant with the chronometer ISO 3159 standard.
Master Chronometer Certified: Guaranteeing the Swiss industry’s highest standard of precision, performance and magnetic-resistance, as set by the Swiss Federal Institute of Metrology (METAS).
Small seconds: A hand on a sub-dial which tracks seconds typically it completes a full rotation in one minute.
Transparent caseback: A transparent caseback - frequently made of sapphire - makes it possible to see the movement inside the watch.

Technical Data
Reference: 235.12.38.20.13.001
Between lugs: 19 mm
Lug‑to‑lug: 44.92 mm
Thickness: 12.36 mm
Case diameter: 38 mm
Case: Steel
Dial colour: Brown
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.): 80 g
Calibre: Omega 8804
Movement type: Self winding
Power reserve: 55 hours

Strap
Strap color: Brown
Strap type: Leather strap
Strap surface: Grained calf leather
Strap underside: Non‑grained calf leather
Buckle type: Foldover clasp
Buckle material: Stainless steel