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, goud, diamant
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