We have all seen the foundry mark on all the major components of BMC cars, but in the world does it mean?

Here is the explanation according to David Doiron.

"MOWOG pre-dates the BMC merger. The Morris Garages in Oxford was the birthplace of the "Morris Garages Special".

The name of the shop later became Morris-Wolseley Garages. The name"Morris-Wolseley Garages Special" was too awkward of a handle, so was the version "MOWOG Special", so just the initials MG were kept and the word "Special" was dropped.

ALL parts boxes (as well as foundry marks) kept the MOWOG designation since parts went to far more cars than just MGs.

The foundry mark for Austins was the "flying A".

When the BMC merger took place, there was an effort to use the BMC rosette as the new "marque". It succesfully replaced MOWOG on printed materials such as parts boxes, but it never really took hold as a foundry mark, and MOWOG remained the most common foundry mark on parts used for the Sprite series."

David Doiron...ex BMC mechanic