Omega Seamaster Railmaster Co-Axial Master Chronometer beige dial steel bracelet 38 mm

A modern heiress, born from a forgotten instrument

When it was launched in 1957, the Railmaster, together with the Speedmaster and the Seamaster 300, formed the founding triptych of OMEGA's “Professional Line.” Less prominent than its two sisters, this watch was nevertheless the most technical of the trio, designed not for pilots or divers, but for those who worked in intense magnetic environments on a daily basis: engineers, electricians, railway workers, physicists.

Its exceptional resistance to 1,000 gauss, made possible by a soft iron inner case, made it a pioneer.

But after a discreet appearance in the 1960s, it disappeared... until its revival in 2003, then in 2017 for its 60th anniversary.

The 2025 version, shown here in 38 mm on a steel bracelet, is a subtle reinterpretation, blending the historical essence of the original model with contemporary engineering.

A beige dial with organic hues

What immediately sets this Railmaster apart from other versions is its gradient dial: a warm, textured beige that gradually darkens to a deep brown at the edges. It recalls the natural patina of time, that of antique tools and noble materials worn with grace.

The applied indexes and Arabic numerals are coated with vintage Super-LumiNova that glows blue in the dark, creating a soft contrast and ensuring perfect readability. Instead of a central seconds hand, a small seconds hand at 6 o'clock – with a matching beige hand – gives the watch a quiet rhythm and rare horological distinction, emphasizing its mechanical character.

The dial is minimalist: only the words “OMEGA,” “Railmaster,” and “Swiss Made” are present, with no reference to METAS certification or water resistance, as this information is relegated to the case back.

A movement more powerful than ever

Beneath the screw-in sapphire caseback is the Co-Axial Master Chronometer calibre 8804, specially designed for small seconds displays. This latest-generation movement offers:

• Exceptional magnetic resistance up to 15,000 gauss, 15 times more than the 1957 model
• Accuracy between 0 and +5 seconds per day, guaranteed by METAS certification
• A power reserve of 60 hours
• An ultra-stable Si14 silicon balance spring, insensitive to variations

In terms of finishing, the 8804 caliber is impressive: rhodium-plated rotor and bridges, decorated with arabesque Côtes de Genève, blackened screws, dark barrel and balance wheel — all details visible through the transparent case back, in a style that is both technical and understated.

A redesigned steel bracelet

The watch is mounted on a stainless steel bracelet with three slightly rounded links, alternating brushed and polished surfaces. It echoes the ergonomics of the Aqua Terra range but with a more fluid integration and a more robust finish.

The butterfly clasp is equipped with a tool-free micro-adjustment system for optimal comfort in everyday wear. The bracelet tapers from 19 mm at the lugs to 17 mm at the clasp, creating a light and well-balanced silhouette.

Ideal proportions

With a diameter of 38 mm, a slim thickness of 12.36 mm and a lug-to-lug length of 45 mm, this Railmaster offers a discreet and balanced presence, perfectly suited to both male and female wrists. A true unisex watch, designed to be worn every day, without compromise.