Eickhoff knife or tool

[Bick]

I have an old Eickhoff knife/tool with initials NY.
Initials hard to read. Well made, heavy duty, tapered tang, 9" long, 3/16" at widest width, 7/8" tall. Rounded back, very straight edge but not sharp. Anybody have knowledge of its id? Use?
Thanks

[petekuhn]

He was located at 381 Broome St, NYC and served on the board of Education there. He was established in 1843 and advertised in a Teachers College Educational Monograph as late as 1890. I have a couple of his knives and a bowie

[Bick]

Thanks for the info.
Still not sure of the use of his tool.
Well made, heavy duty.
A mystery.
Thanks again

[petekuhn]

Might have something to do with book binding? I don`t know. I really like the taper and if You want to trade something .