'Child with Green Ball' by Karel Appel, estimated at €300,000-500,000 at Christie's. Image copyright: Christie’s Images Ltd, 2021.

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The collection includes paintings by such familiar names as Raoul Dufy and Serge Poliakoff and artists from the COBRA movement including Karel Appel (1921-2006). Appel’s Child with Green Ball from 1951, shown here, is one of the works on offer.

The 2ft 7in x 2ft (80 x 61cm), vividly coloured oil on canvas signed k. appel 51 lower right, has an estimate of €300,000-500,000.