Being that it is a 7 HP..It could be an Original, 70, 71, 72, or a 73. Either model is a rather hard to find model, and is defiantly worth the $150.
Some parts will interchange between your 122 on any of these models, but fewer on an Original...They have a different frame design. It just depends on what "parts" your talking about.
A 71 is actually from the same series as a 122, and you would find it is basically the same machine...Besides the seat/fender pan, and the engine.
