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Returnmb_physical,osm,imperiumobject../id/display_mapBrass Medal of Frederick William IV of Prussia, Berlin, 1840–1861. 1930.180.17pk.eyJ1IjoiYmhpaWJuZXIiLCJhIjoiY2xlZWZqZmJjMGdheDNwcW1qaHM2MWZ4cSJ9.oR2ZyKdE7BYKzQkjiotNSg