Long time lurker, first time poster. I've been using this jacket as a sort of sizing benchmark, as it is pretty close in terms of what I want in terms of fit: slim enough to look fine with just a tshirt, can still zip up comfortably, and fit a thin midlayer for really chilly days.
I think it's a Straight to Hell jacket, a brand with not a ton of info about the leather. I have an assortment of a few other TFL-famous brands, but I still go back to this consistently for fit
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Great fit indeed, welcome and have fun