An Arts and Crafts opal necklace

An Arts and Crafts opal necklace, early 20th century, designed as a series of oval foliate links set with opal cabochons, suspending a similar pendant, length 43.5cm, length of pendant 5.6cm, stamped 18CT, fitted case stamped Jay's

Cf.: Vivienne Becker, Art Nouveau Jewellery, London, 1985, pg. 120 no.191, for a closely comparable necklace designed by Carl Otto Czechka and made by Anton Pribil, made at the Wiener Werkstatte, circa 1905