Pat,
That could be right about the ages. A QB forum member sent me the needles cos they are so very close to the Singer 20x1s. But they are round shank. And something else I've not seen before, each needle is stamped BOYE with the thread sizes ex; 30-80 on the shank.
The flat shank Boye 21s are the same as the round shank ones I have except for the flat.
I still wonder what they fit.
Joe