Very, very likely to be English BB. It was early 80s that Pug switched over to using English BBs (perhaps late 70s?). My Pug (which is slowly coming together - many parts stuck in the postal strike (I hate postal strikes)) is a carbolite and was extremely similar to the pic you post (albeit mine was maroon, not white, and is now blue).
Very easy to work out whether it is an English BB - just check the thread direction on the right hand side of the BB. If the turning the BB cup clockwise unscrews the cup, it is English.
@Tjuice
Robadob.
Very, very likely to be English BB. It was early 80s that Pug switched over to using English BBs (perhaps late 70s?). My Pug (which is slowly coming together - many parts stuck in the postal strike (I hate postal strikes)) is a carbolite and was extremely similar to the pic you post (albeit mine was maroon, not white, and is now blue).
Very easy to work out whether it is an English BB - just check the thread direction on the right hand side of the BB. If the turning the BB cup clockwise unscrews the cup, it is English.