OS B 2/3
OS B 2/3 stands for several series of steam locomotives of the Swiss type designation B 2/3, which were put into operation by the Compagnie de l'Ouest Suisse (OC):
- OS B 2/3 (St. Léonard) , from the Belgian factory St. Léonard
- OS B 2/3 (Karlsruhe) , from the machine works Karlsruhe
- OS B 2/3 (Cail) , from Cail & Cie in Paris
See also:
- B 2/3 , a Swiss type designation for steam locomotives
