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| Geometric pyxis ... Piet de Jong ... Cf. Hesperia Suppl. 2 (1939), p. 81. Fragile Watercolor Paper Watercolor |
| Geometric pyxis (bottom) ... Piet de Jong ... Cf. Hesperia Suppl. 2 (1939), p. 81. Fragile Watercolor Paper Watercolor |
| Geometric pyxis (inside) ... Piet de Jong ... Cf. Hesperia Suppl. 2 (1939), p. 81. Fragile Watercolor Paper Watercolor |
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