Voitures OCEM
OCEM cars are French carriages designed by the “Office Central d'Etudes de Matériel de chemins de fer" for various railway companies in the 1920s. More than 2000 cars were built until 1940, all full steel construction . When formed in 1938, the French Railways (SNCF i.e. Société Nationale des Chemins de fer Français) inherited these cars, and operated them until, for the last one…, 1987. Very good lifespan!

Three main types followed one another:
- The 1st one was called "Rivets apparents". All the connections were done by rivets, all of them being visible. That was the classical way for metal assembly during that time.
- Then, considering that visible rivets were not very beautiful and making difficult maintenance, the contruction moves to “Parois lisses” type, (smooth panels). This type had still riveted connections, but side faces rivets were countersunk and not protruded from body, hence the name of these cars.
- Finally, the improvement in welding technique allowed to build welded body, where most of the rivets were replaced by welded assemblies.This final type was called "Faces lisses" (smooth faces).
Several evolutions or refurbishments happened during the life of these cars. We reproduce these evolutions through the various periods.

The pages of this site are OCEM type wise, then spread by period. We produced already 70 different models, and will go on little by little adding new versions.
Common caracteristics and features :
HO 1:87 scale. 2 rails. NEM 311.1 standard wheels. 3 rails axle as standard replacement possible. Pre-disposal for lighting. Minimum radius curve : 420mm. Under-frame and upper-roofs equipements specific to each type. Detailed interior with exact colours.
Length Rivets Apparents : A8 : 268,6 mm B9 : 259,3 C10/B10 258 mm
Length Parois lisses : A8/A8c8/A4/A2s/A3B5/B3/B4s/B3r : 267,4 mm A5D/B9/B5D 266,3 mm C10/C10c4/B10 264 mm A4B5/B4C5/B4c4C5c5 254,2 mm.

Instruction sheet: Download
Lighting instruction sheet: Download
Transatlantique cars overview(french only) : Download
French Railways period (as per MOROP standard NEM 810-f) :