Gold 2 ducat of Friedrich III, Elector of Brandenburg (Friedrich I of Prussia), Brandenburg-Prussia (Königsberg in Bayern
(Germany)), 1690. 0000.999.30597
0000.999.30597http://numismatics.org/collection/0000.999.30597mb_physical,osm,imperiumobjecthttp://numismatics.org/search/id/https://numismatics.org/themes/mantisdisplaypk.eyJ1IjoiYmhpaWJuZXIiLCJhIjoiY2xlZWZqZmJjMGdheDNwcW1qaHM2MWZ4cSJ9.oR2ZyKdE7BYKzQkjiotNSghttp://numismatics.org/search/manifest/0000.999.30597American Numismatic Society