The new Seamaster Railmaster was announced in 2025. The Railmaster was developed for railway workers who ensured punctual train operations, so how has that spirit been reflected in the latest model? We review the actual small second model with a brown gradient dial.
Photographs & Text by Tsubasa Nojima
[Article published on January 9, 2025]
Omega's anti-magnetic watch for railway workers, the Railmaster
In 1957, Omega released three sports watches: the Seamaster 300 diver's watch, the Speedmaster chronograph watch, and the Railmaster antimagnetic watch. Each was positioned as a specialized watch for professionals, with the Seamaster 300 aimed at divers and the Speedmaster aimed at racers and pilots. The Railmaster was a model targeted at railway workers who operated electric diesel railcars, which were prone to magnetism. It was a robust hand-wound watch that combined the antimagnetic know-how cultivated through pilot watches with the waterproof structure inherited from the Seamaster 300.
A new Railmaster model was announced in 2025. While its contemporary models, the Seamaster and Speedmaster, have now grown into Omega's signature collections, the Railmaster has frequently appeared in the lineup but has not received much attention. Since its revival in the 2000s, the Railmaster has essentially been a variation of the Seamaster Aqua Terra, and perhaps because of its somewhat understated appearance, it has remained a minor presence.
The new Railmaster is also based on the Aqua Terra, but the details reminiscent of the original and the dial, which combines gradient colors, create a perfect blend of the Railmaster's distinctive style with the modern feel of a current model.
Railway workers are required to accurately manage every second to ensure the safe operation of trains. A momentary error in judgment could lead directly to a major accident. The Railmaster, which steadily carried out its duties in the hands of such workers, will be available to modern users, so we would like to experience its appeal by getting our hands on an actual machine.
The new Seamaster Railmaster, released in 2025. A hands-on review of the small seconds model with a brown gradient dial. Automatic (Cal. 8804). 35 jewels. 25,200 vph. Power reserve of approximately 55 hours. Stainless steel case (38mm diameter, 12.36mm thick). Water resistant to 150m. 957,000 yen (tax included).
Small second dial in the style of the famous Ranchero
The Railmaster, which was released in 2025, comes in two models: one with a gray gradient dial and a center second hand, and one with a brown gradient dial and a center second hand, each available with a leather strap or a stainless steel bracelet. The model we will be reviewing today is the one with a brown gradient dial and a stainless steel bracelet.
The dial layout is quite simple. Wedge-shaped indexes line the outer periphery, with rounded Arabic numerals at 3, 9, and 12 o'clock. A recessed small seconds hand is located at 6 o'clock, and the brand logo and the word "Railmaster" are printed at 12 o'clock. As far as I know, there are no original Railmaster models with a small seconds hand. Even from the 2000s onwards, the only models available are hand-wound models equipped with Unitas movements. In that sense, it feels more like the Ranchero, a collector's item, than a Railmaster.
The combination of a dauphine-shaped hour hand and an arrow-shaped minute hand is also used on the current Omega Seamaster Aqua Terra. The original from 1957 had an arrow-shaped hour hand and a dauphine-shaped minute hand, so this is the opposite, but it doesn't feel strange when reading the time.
The dial, which is composed of simple elements, is given its individuality by its vintage-style coloring. The brown gradation, which is light in the center and darkens towards the periphery, gives it a smoky and mysterious impression. The hour and minute hands and indexes are coated with brown luminous paint, recreating the discoloration that occurs over time. The luminous paint is applied in a plump manner, giving the somewhat flat dial a three-dimensional look.
An elegant case inherited from the "Aqua Terra"
The case design, which combines short twisted lugs, a plain bezel with a wide and thick finish, and a conical crown, appears to be the same as the Aqua Terra. The case is 38mm in diameter, and the tops of the bezel and lugs are polished, while the rest are brushed.
The previous Railmaster had a similar design, but it was a 40mm diameter, which wasn't available in the Aqua Terra lineup, and was unified with a hairline finish. The difference in finish in particular makes a big difference in appearance, and compared to the previous model, which had a strong tool-like feel, the new 2025 model feels more refined. Considering that the original from 1957 was mainly polished, this change can be seen as a move closer to the origins.
The polished surface is free of distortion, and the bezel in particular reflects its surroundings like a mirror. The hairline is evenly applied even on large surfaces like the case sides, and the edges are clearly defined. The edges where the polished and hairline intersect are perfectly aligned, demonstrating the fine finish that is characteristic of Omega. The crystal is a domed sapphire crystal with anti-reflective coating on both sides.
The case back features a wavy groove around the outside to allow for screwing in of the middle case, a design familiar to the Seamaster collection, and a sapphire crystal in the center allows for a view of the movement inside.
The stainless steel bracelet is a three-link type with short individual links. It has a large range of motion and moves smoothly. The adjustment links are connected on both sides with flathead screws. Only the central row is polished, giving it an elegant impression that harmonizes with the finish of the case. The buckle is a double-opening type. One side is a snap-fit type and the other is a push-button type. A small ceramic ball is embedded in the snap-fit type, providing a satisfying clicking sensation.
While many double-opening buckles do not have a fine adjustment mechanism due to their structure, the buckle of this model is equipped with a "comfort setting" that allows fine adjustment of just a few millimeters by pressing the button while the buckle is open. However, if you close the buckle while it is stretched using the fine adjustment mechanism, a slightly awkward gap will be created.
Master Chronometer-certified Caliber 8804
The movement is the Cal. 8804, a mechanical automatic movement. Currently, many of Omega's simple three-hand models use the Cal. 8800 series or Cal. 8900 series. Both are Master Chronometer-certified bidirectional automatic movements equipped with a co-axial escapement and silicon balance spring, but the main difference is that the former is compact in size and has a reverser winding mechanism, while the latter is slightly larger in size with twin barrels and a wigwag (switching rocker) winding mechanism.
Most current Omega models are certified as Master Chronometers, a certification standard that tests not only accuracy but also magnetic resistance, water resistance, power reserve, and other aspects while the watch is in its casing. Testing is carried out by the Swiss Federal Institute of Metrology (METAS). Because the watch was on loan, we were unable to test its magnetic resistance or water resistance, but at least its accuracy was so excellent that no adjustments were required during the period.
The bridges are decorated with OMEGA's signature arabesque Côtes de Genève, which radiate from the center and create a mesmerizing sight as they reflect light. The mainplate is perlage-grained.
Another appealing feature is the straightforward operation. This model uses a screw-down crown, which must first be unscrewed. Once unscrewed, you can wind the mainspring by moving the crown to the 12 o'clock position. It's a little heavy, perhaps due to the waterproof gasket, but the ticking sound lets you know it's being wound properly. Pulling it out one notch stops the second hand and allows you to adjust the time.
If I had to point out something that bothered me, it would be that the crown rarely pops out when it is unscrewed. There was a time when I almost used the watch because I forgot to screw it back in.
A versatile watch with a unique dial
This is a watch that really shines when worn on the wrist. In addition to its 38mm diameter, the case length from lug to lug is a modest 45mm, so it fits nicely on my wrist, which is 16.5cm in circumference. The smooth bracelet is also very comfortable to wear. However, considering that this is a somewhat sporty watch, a three-fold buckle rather than a two-way buckle would probably have been a better match. While this is purely a matter of personal preference, I would prioritize ease of putting on and taking off over comfort.
Perhaps because it's relatively small and has a low center of gravity, there's no sense of it swinging around when you swing your arm while wearing it. One thing that bothers me is the slight sound of the automatic winding rotor. It's not tiring to wear for long periods of time, and it's a reliable, basic, practical watch that can be worn in a variety of situations, from business to leisure.
The dial is also easy to read. I was worried that the combination of the brown gradient dial and the vintage-colored indices would lack contrast, but that's not the case. The Arabic numeral indices make it easy to instantly determine the orientation of the watch, and the arrow-shaped minute hand helps you read the minutes accurately.
Compared to the Aqua Terra dial, which features striped patterns and three-dimensional indices, the Railmaster's dial has less sparkle and appears to have better legibility. However, this does not mean that the Aqua Terra's legibility is poor, but rather a relative assessment when comparing the two models. If you are looking for both a unique design and practicality, the Railmaster would be a top choice.
What defines a Railmaster?
The Railmaster was introduced as an anti-magnetic watch. However, Omega's Master Chronometer movement has given many models strong anti-magnetic properties, commoditizing their identity. In today's world, where electronic devices such as computers and smartphones are readily available, the importance of anti-magnetic properties has increased to a level incomparable to the 1950s.
Come to think of it, other manufacturers' antimagnetic watches have suffered similar fates. Rolex's Milgauss has long been out of production, and all of the company's current lineup features high levels of magnetic resistance thanks to blue Parachrom hairsprings or Syloxi hairsprings. IWC's Ingenieur has undergone multiple model changes and has now found a new life as a luxury sports watch with an integrated bracelet.
So what remains of the Railmaster? Perhaps it can be summed up in its clean, no-date dial with Arabic numerals. Its stoic design retains the dignity of a professional tool watch, as it was when it was launched in 1957. Taking the two companies mentioned above as examples, perhaps it is closer to the Explorer and Pilot's Watch Mark series than the Milgauss and Ingenieur.
Within the Omega brand, the category of "antimagnetic watch" is probably no longer meaningful. However, the current Railmaster still carries the blood of a historic masterpiece that has supported social infrastructure in a harsh world where every second counts.
