I believe that is a Carleton Co. "Spartan" alcohol torch. If so the air tube will be rectangular, Brach Mfg. Corp also marketed an identical torch under name "Soderall"
Patent was awarded 1921.
There would have been a rubber tube that fitted the metal air tube, the torch is lit and the operator blows gently in the rubber tube, this gives a intense flame at the tip. These torches were popular with jewelers.
I own a Spartan but I would be interested if it were something different.
There should be some makers marks on the front of this torch.
Batz