BOLIVIA. Real “Heart”, 1698-PF. Charles II (1665-1700).KM-unlisted; Laz-unlisted; Cal-unlisted. EXTREMELY RARE and unpublished date for a “heart” 1 Real. The exact reasoning as to why these specially made pieces were produced is unknown. The current belief is that these were specially commissioned pieces produced for ceremonial purposes or special events. Unlike traditional cobs that were pro ...