Ferdinand III, King of Hungary 1625, King of Bohemia 1627, Emperor 1637-1657. 10 Ducats 1651, Wien mint, mint master Johann Conrad Richthausen (1653 Baron von Chaos), AV 44 mm, 33.15 g. Struck from the taler dies. FERDINANDVS III D G ROM IM SE AV GE HV BO REX Laureate, armoured bust, draped with cloak to the right, the year 1651 beneath. Rev. ARC DVX AVST D - BVR S K C C TYR Crowned double-headed eagle with divided shield of arms on the breast, draped with the chain of the Order of the Golden Fleece. Between the eagles' heads the Imperial orb, the shield of arms of Austria/Burgundy with the Archducal coronet below. F. 209; Hahn 39a; Herinek 16. Rare. Minor traces of edge filing, good very fine / about extremely fine Ex J. Schulman, Amsterdam sale 9.10.1933 ('Collection remarquable de monnaies et médailles d'or formée par un Amateur néederlandais distingué'), 188 - purchased through Ciani. The three coins from 1651 that have appeared on the market all weigh approximately 33.5 grams, which is significantly less than the standard weight. Please find here the video of the coin