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Series

Seamaster Railmaster

The Railmaster is the quietly specified member of the Seamaster family. It has no rotating bezel and no timing scale; instead it is built around resistance to magnetic fields, with a symmetrical steel case, a brushed dial carrying applied numerals at twelve, nine and six and baton markers between them, and a printed crossing track behind the hands that refers to railway practice rather than to elapsed time. The reference in this collection is the 40 mm steel watch shown in the frames on a black leather strap, with a date aperture at three o’clock and the line name transferred onto the dial in a contrasting colour. The frames also show the back of the watch, where the movement sits behind a transparent case back inside a steel rim.

All watches
Brushed pale grey dial straight on with applied numerals at twelve, nine and six, baton markers between them, the date at three and a black stitched leather strap below the steel case
  • Dial A vertically brushed surface that reads pale in daylight, with applied numerals at twelve, nine and six, baton markers between them and the line name transferred in a contrasting colour.
  • Case 40 mm symmetrical steel case with a smooth bezel-less rim; the case back is oriented so its lettering sits upright when the watch is worn.
  • No bezel scale The printed crossing track behind the hands is a railway reference, not a dive or tachymeter scale — this watch has no rotating rim at all.
  • Strap shown Black stitched leather strap in the frames; the reference is catalogued on a brushed steel bracelet, so the strap supplied is an inquiry item.

In this collection

One Railmaster configuration

The Omega brand page
Railmaster · Anti-magnetic field watch with date

Omega Seamaster Railmaster ref. 220.10.40.20.06.001, brushed grey dial, 40 mm steel

Model reference: 220.10.40.20.06.001 · 40 mm · Vertically brushed grey dial

A field watch in a Seamaster case: brushed grey dial, arrow-shaped markers with numerals at twelve, nine and six, a date at three and no bezel to turn. The frames show it on a black leather strap, while Omega’s catalogue pairs the reference with a brushed steel bracelet.

Price by inquiry View watch →

This collection lists a small number of configurations. Series not shown here can still be discussed — send the model and reference and availability is checked for you.

Design notes

What defines the Railmaster

A tool watch specified against magnetism rather than depth

Most wristwatches made for hard use are specified against water. This one is specified against magnetic fields, because the work it was designed around happened near electrical equipment and railway machinery. The visible consequence is a dial without a scale: there is nothing to rotate and nothing to time by hand, so the reading is simply the time and the date. That makes it a different purchase from a diver even when the two watches share a family name, and it is why the useful question about a Railmaster is not how deep it goes but what the movement and its resistance were specified for.

The brushed dial is the whole effect

A vertical brush finish is directional: light catches the grain along its length and the dial darkens when the watch turns across it. That is why the same watch can look nearly white in one frame and mid-grey in the next, and why the printed text and the applied numerals have to carry enough contrast to survive both. If you are comparing two examples, ask for photographs of each in the same light and at the same angle, because a dial with this finish is the part of the watch most easily misread from a single frame.

These notes describe the design as it appears in the photographs on this site. Movement, water resistance, weight and material composition are not stated here, because those belong to the specific unit being offered and are confirmed in the conversation before anything is paid.

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Other series and guides

Other Omega series here

  • Speedmaster — The chronograph with two pushers beside the crown and a tachymeter scale on the bezel — offered here in black ceramic and in the Silver Snoopy Award anniversary form.
  • Seamaster Aqua Terra — A steel case with a plain sloping rim rather than a rotating bezel, applied wedge markers and a depth rating printed as a line of text.
  • Seamaster Planet Ocean 600M — A 45.5 mm dive chronograph with a blue ceramic dial, the date pressed down to six o’clock and a diving scale set into a ceramic bezel.
  • All Omega series — the brand page lists every series in this collection.

Guides that cover this choice