Onno Boekhoudt, broche, 1972, ring, 1992, ring, 1997. Schmuckmuseum Pforzheim. Foto Esther Doornbusch, mei 2019, CC BY 4.0

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Onno Boekhoudt, broche, 1972, ring, 1992, ring, 1997. Schmuckmuseum Pforzheim. Foto Esther Doornbusch, mei 2019, zilver
Onno Boekhoudt, broche, 1972, ring, 1992, ring, 1997. Schmuckmuseum Pforzheim. Foto Esther Doornbusch, mei 2019, CC BY 4.0

Onno Boekhoudt, broche, 1972, ring, 1992, ring, 1997. Schmuckmuseum Pforzheim. Foto Esther Doornbusch, mei 2019, CC BY 4.0