Sibyl Dunlop Brooch (Ref: 6293)
SIBYL DUNLOP 1889-1968 Attrib.
Arts & Crafts Brooch
Silver, Swiss lapis, cornelian & chalcedony
Length: 3.2 cm (1.2 in)  Width: 11.2 cm (4.3 in)
British. Circa 1930

Fitted case
Literature: cf. Jewelry & Metalwork in the Arts & Crafts Tradition
Elyse Zorn Karlin, 1993, p. 54