Case would be embossed “22B”, plus burners for gas/petrol/white gas only had two tubes, kero have four, then alcohol have a different design. Kero version could also burn gas, working better with kero jets removed and gas or multi fuel jets installed. Duane
The burner that you show is a petrol/gas burner. You can easily identify them, as they have no fuel running through the top of the head. You can clearly see that one tube is open, for running alcohol down to the cup, and the other is closed off and only acts as a heat pipe. A kero burner has 3 or 4 tubes which do carry fuel through the top plate to vaporize the fuel and lead the heated vapor to the jet. So, as far as I can see, this is a 22b Regards, Arjan
