If that is a 426B it is older than you think. The 426B's were made from 1954 to 1962.I love Coleman stuff. One of my prized pieces of camping gear is a mid-1970s Coleman 426B 3-burner with a matching cast iron griddle I got from a river outfitter who was clearing out his stuff. I think I gave him $20 for it. Love is enjoying sunrise with a cup of coffee, making breakfast burritos or pancakes on it watching the run rise in the desert.