The Hislops's price guide can be found on Amazon (edition 2007, that's the last edition), in case you are still looking: http://amzn.to/2Db7jx8
Wow, beautiful piece! Also looks to me like a N or Z... good luck!
To clean cameo, first remove any accumulation of dust and then rinse using warm water. After careful rinsing, dry the cameo by patting with a...
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