This brass alcohol stove does not have any other label then "OMAG" (that means "Otto Müller Aktien Gesellschaft"). Top view: The head removed: The body and ignition pump with spring and removable feed tube: There was a paper(?) gasket between the head and the body. I replaced it with fluoroplastic tape: During ignition, there is a flame in air intake hole: Initially there was even a liquid alcohol leak from the control knob, so I added asbestos cord gasket: Even more, it did not work stably initially. But after calcining the generator tube in external flame it started to work fine: It boils 500 ml of water in 6 min 15 s. On the same test stand, Primus 96 boils it in 3:20. By the way, does somebody know, when was it made? I did not find any information about this model.
UPD. I measured the ethanol consumption. In 12 minutes (the time it takes to boil one liter), excluding ignition, it consumed 23 g.