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In the case of this object this can be done by:
Writing to Mr James Carleton at Farrer & Co, 66 Lincolns Inn Fields, London, Wc2a 3lh
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A Charles II two-handled porringer and cover
Maker:  Maker Unknown
A Charles II two-handled porringer and cover, chased in the Chinese taste with two figures, two birds, and exotic plants, engraved with a later coat of arms within foliage wreath, the raised cover with acanthus bud finial - 7in. high, 1684, makers mark SH conjoined.
THIS ARTWORK IS LOCATED IN:London