The footprint/style of these machines:
https://www.quiltingboard.com/attach...0-p1010161.jpg
https://www.quiltingboard.com/attach...223_185538.jpg
is very similar to my late 50s/early 60s Kenmore,
and this early 50s one I just found on eBay,
https://www.ebay.com/itm/303536941113
all seem to be badged machines from the same factory, all what I’ve found that’s been said about them is that they are all very tough, hard working machines. Although I don’t think I’ve seen who the manufacturer is. I’ve seen
Soryu and Koyo mentioned.