The present watch is a fine example of the second generation "Railmaster" model, featuring the engraved seahorse logo and inscription Railmaster to the back.
Ref. CK2914 was launched in 1957 and designed for professionals working near magnetic fields.
The designation "Railmaster" was chosen to reflect Omega's longstanding relationship with the railways. The high degree of precision achieved by Omega's watches led to them being the brand of choice of many of the world's railway companies. The movement of the "Railmaster" is encased in a mu-metal cage protecting the movement to 1000 Gauss. Following IWC's "Ingenieur" wristwatch, the "Railmaster" was the second wristwatch to achieve a level of resistance up to such a high level.
In production during a short period of time only, the Omega "Railmaster" enjoys today enormous popularity amongst collectors. The Railmaster model is described and illustrated in Omega Sportswatches by John Goldberger, pp. 81 - 93, and in Omega - A Journey Through Time by Marco Richon, p. 220-222.