I know I've seen the LA number mentioned some where. It's the singer machine with all parts having singer cast or stamped in. instead of sinmco #2425267 singer #2425267 also has singer cast under the bed. class 15 mechanic's. upper tension and take up arm facing you, but a class 15 type tensioner . the tensioner is why it wasn't in the treadle cabinet. they have the wrong set up in it