I bought a brand new Speedy B 25 in DE today (arrived in mail), and that has a small black mark similar to your "wear" but not even in the corner, it is in the middle of the bag, one inch below where the handles fall.i’ve had my speedy b since 1/12/2020. I had it stored in the dust bag and took it out to check the wear the other day and all 4 corners are black. I’m still bummed, because I baby my bags! I was very careful, never placed them on the floor, always stored it in the dust bag, etc. This wasn’t even my every day bag. Mine was made in the usa.View attachment 4965235