Hey, Adam. I notice that the photo of your M-36 shows a tube with fittings and also one of those nice little plastic mouthpiece containers, neither of which would have been included with the M-36 when it first appeared. This suggests that yours is one of the later ones during the 1961-74 time span. It also has an A-32 showing on the brochure (of which I also have a copy), which probably means your M-36 is late 1960s or early 1970s. Maybe that helps explain why it’s in better condition than mine. That means that mine, while busted up, is probably more authentic. So, would you like to trade?