The Seamaster Railmaster Chronograph is a wristwatch by Omega in the Railmaster range. It is a chronograph version of the 2003 newly produced Omega Seamaster Railmaster Chronometer.

The original Railmaster was first introduced in the year 1957 and strengthened the already existing connection between Omega and the railroad. Although the company hat officially delivered pocket watches to railway companies since 1895, the Railmaster was the first watch that was designed specifically for railway employees, scientists, technicians and electricians as well as all other professions who worked with or in the vicinity of strong electric currents, for it had at that time a special antimagnetic double caseback to protect the movement against the damaging effects of electric fields.

The current model is available in four different sizes, from Midsize to XXL (see Omega Seamaster Railmaster Chronometer and Omega Seamaster Railmaster XXL Chronometer) and in the version shown here as a chronograph.

• Omega-Uhren. Kaleidoskop einer bekannten Swiss Marke; Author Anton Kreuzer; ISBN 3853783546
• Omega-Modelle; Author Anton Kreuzer; ISBN 3853784186
• Omega Sportuhren; ISBN 3871880817
• Das ZEITGEFÜHL-Uhrenbuch; Author Gerd-Lothar Reschke; ISBN 3-938607-61-0