Here are a few of the cased stones that I have sold over the years., 
just for ideas

This one was a recent find.

http://oldetoolshop.com/toolpics/sharpeningstone0201a.jpg
http://oldetoolshop.com/toolpics/sharpeningstone0201b.jpg
http://oldetoolshop.com/toolpics/sharpeningstone0201c.jpg
http://oldetoolshop.com/toolpics/sharpeningstone0201d.jpg

This is a neat razor hone with a hinged lid.

http://oldetoolshop.com/toolpics/sharpeningstone0302a.jpg
http://oldetoolshop.com/toolpics/sharpeningstone0302b.jpg
http://oldetoolshop.com/toolpics/sharpeningstone0302c.jpg

This one had brass hinges and a latch along with a leather hone glued on top

http://oldetoolshop.com/toolpics/sharpeningstone0501.jpg

Another razor hone with single piece top and base.

http://oldetoolshop.com/toolpics/sharpeningstone0901.jpg

There have been more but I hope that this gives some ideas.

Tony (where the weather has been nice and hoping for a good flea run 
tomorrow..)

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