This is a fine No.1-type stove. At some stage it has acquired an Optimus burner but it is still a wonderful stove. The thing that catches my eye is that amazing logo. That alone makes it a very desirable stove.
Hi, interesting stove and great logo. I wonder if there is any relationship to the Kosmos Brenner wick burners for Kerosene lamps, and alcohol stoves: https://classiccampstoves.com/threads/ As for the Optimus burner, the Swedish manufacturers appear to have used the old orthography Cyrillic script until the 1930s, so the burner could be contemporary with the rest of the stove. Best Regards, Kerophile.
One and only? I think this stove is absolutely rare. The 1932 "KOSMOS" prospekt has old logo. New logo must be after this year. Black on airscrew is from not petro-resistant seal. D.