Omega - 2802.52.37

Seamaster Aqua Terra 150M Co-Axial 42.2 Railmaster / Brown Alligator

Brand: Omega
Family: Railmaster
Reference: 2802.52.37 (aka: 28025237)
Name: Seamaster Aqua Terra 150M Co-Axial 42.2 Railmaster / Brown Alligator
Produced: 2003 - 2010
Limited: No


Material: Stainless Steel
Glass: Sapphire
Back: Open
Shape: Round
Diameter: 42.20 mm
Lug Width: 21.00 mm
W/R: 150.00 m


Color: Black
Indexes: Mixed
Hands: Arrow
2802.52.37 : Omega Seamaster Aqua Terra 150M Co-Axial 42.2 Railmaster / Brown Alligator


Introduced at BaselWorld 2003, the Aqua Terra Railmaster is a tribute to the Railmaster of the late fifties. The model presented here (ref. 2802.52.37) has a stainless steel case of 41mm and a brown alligator strap.

The original OMEGA Railmaster was first launched in 1957 – the same year as the now legendary Speedmaster model – as the successor to a watch created for the British Royal Air Force in 1953. Designed specially for scientists, technicians, electricians and railway workers, or anyone else working in or around powerful electric currents, it had a special double antimagnetic case to protect the watch movement from the harmful effects of these electrical fields. The outside case was made of Staybrite stainless steel, with a polished bevelled bezel, polished solid enveloping lugs, reinforced crystal and a screw-in back with O-ring gasket to ensure water resistance. The inside case consisted of a protective cap, a casing ring and a 1mm thick dial (as opposed to the 0.4mm for a standard dial) made of soft iron, which formed a screen against magnetic fields of over 900 Oersted in any position, as opposed to 60 Oersted for a conventional antimagnetic watch.


Omega caliber 2403 Version of caliber 2500 without date for use in Railmaster.

Base: Omega 2500
Diameter:25.60 mm
Reserve:48 h
Frequency:25200 bph
Time:Hours, Minutes, Seconds
Additionals:Co-Axial Escapement, Chronometer

More watches using the Omega 2403 caliber