I have a Grasshopper I bought in the early 70's. Its a propane model where the propane bottle is the 3rd leg. You control the propane by twisting it where the propane bottle attaches to the stove. It says Primus Sweden on the stove and has a number 201.724030 on the stove head itself. I cleaned up the jet holes with welding tip probes and the only thing it needed was a new rubber gasket in the head which fortuneatly I had arch punches available to make the gasket. If anyone can tell me anything about this stove I would be grateful.