Thread: Tapered barber hone?

This supposedly belonged to my great-great grandfather and was his razor hone. I had to wash off what seems like 100 years of drawer gunk when I got it just to get a feel for the grit. I've never seen or heard of another like it. Typical 5 to 6k feel to it like most other barber's hones. The only stones I've ever seen shaped like it are ice skate hones but this is much finer than any of those. They typically top out at a few hundred grit. Anyone have any experience with one of these or know anything about it? No marking on it to indicate the company.