I restored a Gibson Super 400 arch top guitar for Tom Van Hoose back in the 1980’s. He has published a book about the history of the Super 400 model and it includes a chapter on the 1939 model that I rebuilt.
The guitar was a complete wreck and had to totally disassembled. When the work was finished the guitar looked and sounded great. Tom said it was one of his favorites.
http://www.vanhoosevintage.com