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Continue to ChatKlaus Ullrich, broche, 1969. Collectie Ida Boelen-van Gelder. Fotografie Aldo Smit© https://hedendaagsesieraden.nl/ullrich-klaus-1927-1998-brooch-gold-steel-spektrolite-1969-5-4x4-3-cm-list-nr-212-i52a0399/