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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 cylindrical rhodonite parasol handle
Maker:  Maker Unknown
A cylindrical rhodonite parasol handle, in eccentric white enamel mount with rose-diamond upper border, two bands of chased green husk ornament below - 2 3/4in. high, workmaster Henrik Wigstrom (restored, three stones missing).
THIS ARTWORK IS LOCATED IN:London