Ernestine Mills enamelled plaque – a premium-inclusive $4375 (£3500) at Treadway.

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But also up among the top lots were some pieces of English Arts & Crafts enamel and metalware from the Robin Greenwald collection which realised substantially more than their modest estimates.

One was an 8 x 4¾in (20 x 12cm) enamel plaque monogrammed EM lower right, decorated with a Pre-Raphaelite style scene featuring an armoured knight and another figure. It made a premium-inclusive $4375 (£3500) against a guide of $350-450.

The plaque was the work of Ernestine Mills (1871-1959), an artist and metalworker who learned enamelling from Alexander Fisher. She was also an active Suffragette and her work includes pieces of enamelled jewellery for the WSPU (The Women’s Social and Political Union).

Shields design


Frederick James Shields enamel plaque – a premium-inclusive $4063 (£3250) at Treadway.

The sale on on May 3 also included an unmarked 8¾x 6½in (22 x 16.5 cm) Primavera plaque which was catalogued as the work of Fredrick James Shields and estimated at $250-350. Shields (1833-1911) was an artist and designer who worked with the Pre-Raphaelite painters.

This too outpaced its guide to sell for a premium-inclusive $4063 (£3250).

A group of three hand-hammered copper Arts & Crafts candlesticks, the tallest of which stood 15in (38cm) high, took $2470 (£1976).

The top-priced lot of the auction was a rare 9 x 3in (23 x 8cm) signed Gallé ceramic vase fashioned as a flowerhead which realised a multiple-estimate, premium-inclusive $23,750 (£19,000).