Arnold, the pictures are not coming through. Could you post them directly?
I really suspect that these were some form of kit. The flywheels and cylinders are all the same. There seem to be 2 different bases and some have the cast cross-slide support. Some have disc crank, others have arm crank. Some have round rod, others flat steel. There seems to be a grouping of some features, but each one is a little different.
Seems a bit big for a model, but I don't really know. They are clearly individually made, but the castings clearly came from somewhere. Would love to see an ad in a magazine.
bill