Joe, and Steve, I thought I'd check the size of my Singer 66 bentwood top, and found it was larger than Steve was quoting.... and then the thought hit me........... 66 is full size, Joe wanted to know the size of a 3/4 size top for a hand crank. Dumb me! I measured the insides of the top for my 1924 99 with the foot control and also my 1928 99-13. Both of them have the same measurements as Steve quoted. Unfortunately I don't have the 99 handcrank to measure, but I'm thinking that it's measurements are the same. It just needs a crank that folds into the machine area, like the handcrank of my Gritzner does. Does this make sense?
The reason I was measuring my 66 is that I'm still trying to find out if my 1922 red eye started out as a treadle or a handcrank. She is in a bentwood case.
Janis