A platinum diamond set lorgnette handle

A platinum diamond set lorgnette handle, the tapered handle with applied monogram 'CB' surmounted with a crown, grain set with rose cut diamonds, to one end a bell cap with suspension loop and ring, all grain set with rose cut diamonds, two diamonds deficient, to the other a collar grain set with rose cut diamonds, three diamonds deficient, to sprung loaded lorgnette mechanism, glasses deficient, tested as approximately platinum, 100mm long, 10.10g
Sold for £520

Condition report:
Handle only, no glasses present.
Some diamonds missing.