When I saw this stove at the flea market, I had a hard time telling what it actually was. I'd never seen a stove this dirty before. None of the inscriptions were legible. But some signs pointed on a early Primus and after a careful cleaning of vent screw I could read PRIMUS. I did the rest of the cleaning process at home, which caused a brief conflict with my wife after the procedure was completed. Filler, pump and raising tube were resoldered in the past. Unusual cast iron trivet seems unoriginal to me. On the side wall of the tank there is an inscription in Cyrillic about the manufacturer The bottom of the tank On the bottom of the tank there is something what looks like the letter "P" turned upside down The rest: The next photos shows the low position of the alcohol bowl on the rising tube and the flat legs And at the end - burner This stove should have been manufactured before 1911. To my surprise it works without replacing or repairing the NRV. Pump washer and filler cup gasket had to be replaced, of course. Imo the yellow color of the flame is due to a decalibrated nozzle. Thanks for watching Stanislaw .