Thread: Uncommon geometry of the blade

I bought this Marshes&Shepherd (1818-1850) some weeks ago, with the conviction that the blade was in its original state, without hone wear. Note that the spine has no hone wear at all. I bid on this: the blade has an uncommon but original geometry.
Yesterday I found one proof that I wasn't wrong: Lummus published in his first article (1922) a blade by the same manufacturer with the same shape!