Courtesy of Monte Dodge Stove on left is a 1962 Coleman 501 with the round generator. This model was recalled after only a few months as they had trouble getting it a vaporize properly. ( I just use a tablespoon of alcohol like priming my Optimus 00 and it works fine!) Stove on right is it's replacement, the 502 . This one is a 1965 model that belonged to an old uncle in Alaska. 502's are still common here in the states and still make good Canoe or car camping stoves.