Bostonian shells, i think. Will look good cleaned up. 10.5C:
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Those shells need trees, pronto, and they also look like they might be a bit dry. If they were mine, I'd polish them up with the Mac Method, then treat with Venetian Shoe Cream or equivalent. Nice shoes, but if you're not careful and don't provide lots of TLC ASAP, they could crack, which would be an awful shame.