deedum

I have a singer 15-91 from 1946. The light is upside down on it. Who knows what or when this happened or how. I need to know how to take it off and put it on correctly. Actually, my dh said he will, but it has screws and a balic and such and he is not sure how to attact this. Kinda odd set up. Any help appreciated.

I think looking at the pictures here you can why the light is not helpful as it should be. Thanks again.