I picked this up a while back, not knowing what it was. Only the pump is labeled but it sure looks like Prentiss-Wabers burners. Folded up it is a little bigger than that 111, but a lot heavier of course. The burner manifold is hinged where the second burner valve is located. It is a lot of parts to assemble and the little hooks that hold the case flat are probably bound to break off at some time but, so far, these are fine. It looked like a previous owner had used some kind of putty or caulking to try to seal the tank cap, I cleaned it and used an o-ring to get a seal. The pump leather was dry but flexible so a little mineral oil got the pump working. Other than that it was rusty and stubborn for a while but now both burners work.