If ATT was still being made, this is the one I would buy. I like the colossus handle the best, will only use mild razors, and Windsor has no blade overhang.I purchased an ATT on the B&B forums. I believe it was a gift and the owner only used it once, if at all. The seller didn’t know anything about it, but the price was too good to waffle.
I believe it is a Windsor with an M1 head, and a colossus handle. I know the M1 is mild, but with an efficient blade I can easily obtain an ultra smooth BBS.
I must admit that it’s been ignored as I have spent a lot of time experimenting in the vintage razor rabbit hole.