Originally Posted by sewred
I am in the process of looking into it for you and hope to find something soon. It looks alot like some of the ones i have and i will have to look up their numbers. This is a picture of the one i'm sewing on right now it is from 1956 and it is a model 66, but yours is older than this one.
I think the manual said model 99-3 or 99-4