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There is the problem, right there in one line, it is NOT agreed upon, hell we still have people call it a Barber's Notch and that has NEVER been found anywhere in the old advertisements
Hollow point...

You have to look at what the razor looked like when made not after being honed to death

They are most often called a "Sabre Grind" they are fairly uncommon, and that is just another variation of...