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Not sure when the first industrial cat was. would be interested in getting more info. This is 37. Has a krinkle finish on the cover. Has some tools I have never seen. Just when I thought I was getting close to finding all the industrial speeders, I find this, and more.
I had a avia. cat at one time, I think it was from the 80s. I do not collect the cats, but buy one from time to time, esp. if its a odd one like this. This is a full size cat, like the 39, another thing that makes it odd.