Hi Dan,
hmmm.... not something I've ever seen before. Nothing obvious coming up on google so far, apart from the model number would appear to be 20/4250 ?
I see in your post on mylargescale.com you included a couple more photos than you have here? What are the markings on the motor (I can't make them out in the photos) ? You have what looks like a connection diagram with the bundle of wires - any clues there? The photo is too small to make out for sure, but I think I can see the sinewave symbol for AC written on the diagram. Can you post an enlarged photo?