John Donald, broche/hanger, 1963. Schmuckmuseum Pforzheim. Foto Coert Peter Krabbe, mei 2019, CC BY 4.0
John Donald, broche/hanger, 1963. Schmuckmuseum Pforzheim. Foto Coert Peter Krabbe, mei 2019, CC BY 4.0

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John Donald, broche/hanger, 1963. Schmuckmuseum Pforzheim. Foto Coert Peter Krabbe, mei 2019, CC BY 4.0