Ivory skull netsuki

[Pepe3108]

Hi this is my ivory skull im showing, id be interested if anybody knows any japanese as there is a signature on the back of skull, or could date it, iv resurched it a bit and not found anything yet, all i know is its a netsuki,made in japan, from elephant ivory, iv seen a few diferant ivory skulls rangeing from 150-1000.
Thanks

 

[scotrace]

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