B & M Group 1938-62 Plunger & Rigid

The design of this gearbox goes back to the early 1930’s although applications have only been researched back to 1938. For earlier models refer to the maker’s parts books, see here. The list below covers 3 variations of what is essentially the same gearbox although the short lived 1946-48 B group variant has quite a few different parts from the other two. All parts are listed but are not necessarily available, click on a part number for current availability.