Thread: What stone is this?

I basically got this thing for free, but don't know what it is. I'm thinking it's a Barber's Hone, but I know little about them anyway. You can see the markings on the hone and box below. It has what looks to be a piece of leather on the bottom. On the bottom of the box is actually a mailing type label with a bunch of 2 cent stamps all over it. There is a guy's name filled out kinda hard to read.

Anyway, anyone know
-grit,
-name,
-usefulness,
-quality,
-if it can be easily lapped with a D8C or do you even need to lap it at all,
-and when in a progression I would use it?

Thanks!