This is a "Sunflower" Vacuum Oil Company, No 2. It was made in Portugal by Cormache. It seems to be very well made of heavy brass and runs like a champ. Other than that I don't know anything about it. I can't find anything on the Cormache company. It seems similar in design to some of the Hippolito stoves also from Portugal but I don't know if there is really any connection. Hopefully the sizable knowledge base here at CCS can shed some light or at least some speculation.