hinges one and two hole/screw
one hole is an older style.. the hinge large round part is the same size, the pin same size, on these the difference is the length of the pin
dark hinge is very early hinge like a treadle, but the silver hinge might be a 60's to 70's version. if you look at the pin there a groove machined all the way around,, early pin had no groove, then later they machine a flat area on the bottom of the pin either hinge will fit all singer machines
[ATTACH=CONFIG]507083[/ATTACH]