Help with unknow hone identification....?

[McWolf1969]

Just recently got this old hone and was wondering if i could get some help with identifying it.
What i've observed so far, is that it seems to be made of some type of ceramic, similar to barber hones...ive listed it in the center of a three line swaty and a pike swaty for comparison.
Visually it looks the same, however, there seems to be red speckles in it. It laps the same and after running a couple razors over it, it does make the edges quite sharp and sticky to the touch....ive just never seen one this size.
Dimensions: Approx. 8x2x1

Many thanks,
Mac