mystery tribal/bedouin pieces - what are they?

[rojo531]

Acquired these two matching pieces a few years ago. Would like to know what YOU think they are used for, and where they come from. There are no marks but they have tested positive for low grade silver.

http://www3.filehost.to/files/2007-04-2 ... front1.jpg
http://www3.filehost.to/files/2007-04-2 ... yback2.jpg
.

[2209patrick]

How big are they?
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[rojo531]

Sorry!!! the measurements are right here but my brain was not.
the large disc is 5-3/8 inches in diameter
the small disc is 1-3/4" inches in diameter
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