Hi Guy's,
I've picked up an 'Everkeen' oilstone from eBay for next to nothing, now I'm looking for some information about it!
It's very dense for it's size, dark blue-grey to black. I can't tell for certain if it is natural, but it has saw marks and could be some form of slate I guess.
It's probably '30's to '50's vintage, and retains some original packaging. There is a logo that looks like a fox or lynx perhaps. It proudly proclaims it's British Made origins.
I have now lapped it to 1200grit, and it has a smooth, matt finish, with no imperfections visible.

Please see photos below;








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