I picked up this beautiful 16" Gretsch case that's 4.25" deep plus 1" on the lid. I have never seen another one like it and can't find info on it. What's odd is that it has an arched top AND an arched back and it's covered with the same tweed used on the George Harrison tribute case. I have a G.H. case and the tweed is identical. Anyone know what guitar this was made for?