I have no idea how to help you. Obviously, it's not an electronic machine, as 1960 is before electronics were in wide use. If you don't get a good answer or direction, you might join the
old pfaff forum on groups.io. I'm not a member, but it appears that it's a active group from the "last post" time. The groups.io is a site that I learned about when Yahoo.com stopped hosting groups. I was in a fabric swap group. We switched over to them at that time. There is no fee, but you have to sign up.
They say their group is for old, non-electronic machines that weigh at least 25 pounds. (That made me smile.)
bkay