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In the case of this object this can be done by:
Writing to D.j.r. Robinson at Forsters Llp, 31 Hill Street, London
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Intaglio Collection - no.185 A humped bull
Maker:  Maker Unknown
Intaglio Collection - no.185 A humped bull, nicolo, small hole bored through and now filled with a turquoise.
THIS ARTWORK IS LOCATED IN:Lincolnshire
This item is available for viewing by appointment through the contact shown