BM SG2
BM (Barnes & Mullins) SG2 dating from 1968 this guitar was built in the UK by Shergold for distributors, Barnes & Mullins, but has never appeared in any of their catalogues so it may be a “one off”. Jack Golder, founder of Shergold, referred to it as the “Pie Crust” model in reference to its body shape.
For more information see the Historic Guitars page where there is an extensive write up.
Jack Goulder interview in 1977 on YouTube