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Of course we are interested!!! Thank you!
~Richard

Thank you for the information! That is a new slant upon an old stone!I appreciate the knowledge!
~Richard

Here are a few more:
http://i1168.photobucket.com/albums/r497/fabdlux/Thurione-1-1.jpg

And they made some big ones also:
http://i1168.photobucket.com/albums/r497/fabdlux/KIF_0030-1.jpg...

I believe the stones were mined and packaged by The Escher Company as the end labels, with E&Co. are found on many of them.( Not on mine, though.)
So to be absolute but maybe not correct, Without an...

I shall chime in.
The varnished hone shown is similar to mine. Here is a photo from somewhere that would fit the boxed hone of Leading Edge:...