In 1938 the 3H was redesignated 413B. This model was made from 1938-40 and 1942-1946. It has a cast iron burner/manifold, a Solodur tank and Band-a-blu burners. This is an earlier one, judging by the paperwork that came with it dated Jan. 1939. It was briefly replaced by the 419 stove, but came back after the war began and Coleman needed to cut back for the war effort. It is in really nice condition thanks to the wood box the owner made for it.