I've seen pic's of little black white maybe it was yours. turn these two over and there the same. all the iron casting are the same, cranks and rods, the face plates would interchange.
before this I was never interested in this era of machine, I just picked up 25 18 of those must be 1950 to early 60's. 6 15 clones, 5 of those I will call new
Now I want to make a train around my yard. have a sew machine train, but it has to actually work