When I was home this past week my Dad gave me an oxy-acetylene torch for my vintage torch collection. This particular torch is an Airco-DB 9100 with a Style 919 no. 5 touch tip on it. He got this torch along with a two small tanks, regulators, hose, and a hefty storage rack for the tanks, for under $30.00. I brought it home and cleaned it up. The Airco-DB a beautiful little torch. I've done some looking around and found this link that discusses early WWII sheet metal torch welding set-ups and the Airco is listed on the site along with the following picture of some Airco torches.
I also found this page from a book published in 1922.
I'll have to do some more digging around as I can't find a ton of info about this torch. I have all of the materials I need for torch welding aluminum and I'd love to see if this torch might be a viable option for welding aluminum. I'm anxious to try out my aluminum welding materials and have a go at the 3003 aluminum sheet in my studio. I've been watching the old videos and I think I'll be able to add this to some of my teaching. If anyone out there can date this particular torch, I'd be interested in hearing more about it's history.