Hello Everyone, I purchased this stove,photo attached at a local Auction. My intention was to use the tank for a model stationary engine. However after giving it a clean I became curious as to its origins, that is how I found your excellent Forum. Can anyone provide any information. It has Primus Sweden on the filler cap and pressure relief screw, and the tool for removing the jet and the NRV has Primus Sweden stamped on the shaft. The tank is copper and it has a pressure gauge with the writing in English ie. lbs per square inch, and is graduated 15 - 30 - 45 psi. The tank construction looks unusual as the cylinder ends are folded on the outside of the end plates.