Toiletware Set Pottery Mark - Keystone

by Merrilea
(Harleysville, PA USA)

Can any one help identify this pottery mark?
It says KEYSTONE inside a Keystone, seems so simple but I have been unable to find this specific pottery mark anywhere.
Thanks for any help.


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Dec 06, 2020
Just the tiny bit of info I can offer
by: Megan G.

I have a small pitcher with a similar mark that was among my grandmother’s effects. The handle is the same style as yours. Since she passed in 1982, I can only supply that these items must be older than that.

Apr 08, 2015
keystones pottery mark NEW
by: Holly A.

I just purchased a large white basin bowl with the old Keystone stamp. It is very old, no chips, minor crazing, a little discoloration from age. The word keystone inside a keystone. I cannot find anything, anywhere about it, except for the set of pottery you posted on this site. I would like to know more about it and it's value ?

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