One of those things

[Jonzer]

My buddy found this years ago and had it laying in his junk drawer ever since.
He asked me if I knew what it was.
I think it may be one of those sickle sharpening stones from the 19th century.
Hippy and Mooch showed me some fine examples at the Mason County show a couple of weeks ago.
I understand that some people think they are indian artifacts.
Can any of you properly indentify this piece?

 

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[Jonzer]

Id like to see a pic of the horn holders they carried em in.
Thanks Targe.

 

[Tnmountains]

Kinda like the battery cores that pop up. Great I.D