Thanks Bernie. Since I posted this, I did a more careful search in the technical area and I think I found the answer. Looks like the front drums are 12 inches in diameter and the rear drums are 10 inches in diameter. I also found another reference which seemed to indicate that earlier BL’s had 10 inch diameter drums on the front as well. Appreciate the info regarding the reprints, will contact Ian about that.
Robert Filbey