I picked this saw up today at an estate sale for $1.50. It's pitted, bowed(but not kinked) and missing an original bolt (medallion?).
I usually pass on saws that are pitted, but its the first nib I've seen in the wild, so I bought it.
This may not be the original handle judging by how much the slot in the handle extends past the blade.
It's 7 tpi
Nothing on the Disston site looks like it.
So what and when is it?