Regensburg. Freie Reichsstadt. Gold Half Ducat Klippe, nd (ca. 1750). 1.67g. Within cartouche: crossed keys with R above and B below. Reverse: Imperial eagle (Bach 4866-68, Beckenbauer 509-510, Fr.2540, KM 328). dies engraved by Johann Nikolaus Körnlein. Smoothed at top where a hole had been skillfully plugged or a soldermark removed. Extremely Fine. Ex ‘Dr. Lawrence A. Adams Collection’, CNG Sale # 100, Lancaster, August 25, 2015, lot 690.