Friedrich Wilhelm, 1640-1688 Ducat 1651. CT, Berlin. Armored elector standing almost right with shouldered scepter, left hand on his hip. Rv. Crowned shield, the date 16-51 above, on either side the mintmark C-T (Christian Thauer, Wardein in Berlin 1651-1658). 3.45 g. Bahrfeldt 37b. Fr. 2206. Of great rarity. Good very fine. Slightly bent.