I picked up a NOS 15124 snow thrower with some other stuff the other day. It has never been used, but has sat outside unfortunately. It took me a while to figure out what it went to. From what I have found, it fit models #940 and 942. The serial number is 0100202. After looking up what the models were that it fit, I am not surprised that it was never sold by the dealer. I have never seen one of these models for sale in this region. I tend to wonder if there was ever a second production run, and how many were ever made.
I had gone to pick up a NOS thrower for my H14, and this one was for sale also. It is a slightly smaller version of the one for the H14. I'm not sure what I am going to attach it to, it is a little narrower than I would like to use on a tube frame, and noticeably lighter. It is wide enough to work on a two wheel tractor, but the rotation is backwards for the tractor I have. Another potential retrofit, like I needed another!