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18 Andries Dirk Copier (1901-1991) 1947, signed and marked Leerdam Unica Z 604, with certificate. A heavy blue glass vase of globular shape with air bubbles in the shape of horses and trees. H 25 cm €2,500 - €1,500 19 Andries Dirk Copier (1901-1991) A heavy glass vase of conical shape with twisted vertical ribbons of air bubbles in a grey crackle interior. H 16 cm €1,000 - €1,200 20 Karel Appel (1921-2006) Untitled signed and dated ‘appel 60’ (lower right) watercolour, gouache and charcoal on paper, 66x50 cm €4,000 - €6,000 1949, Marked Leerdam Unica, signed and numbered AA 253.
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