Monkey Ward 1890b, or UDT J1980. I had one of these, briefly. It was a thrift store find for $25 but I just didn't like the way I had to fiddle with the tension all the time to make the decorative stitches work right. I donated it to a nursing school so that students could stitch the school patches on their uniforms and/or mend their torn pants, lol.
This is a pic I stole from the Interwebs (ebay U.K.) of the same machine, since I don't have that machine anymore. It was a smallish machine and I was told by VintageSingers people that this model has too many plastic parts that would break and not be worth repairing. But it did a lot of decorative stitches.