Watch List notes:

Potosi, Bolivia, cob 1 real, 1710Y, date as "10," rare, ex-Bir. S-P43a; KM-28; CT-1638. 3.85 grams. Rare variety with bold full "10" (no 7) between nearly full pillars, crude Fine with scratches, nicely toned but with some black spots. Pedigreed to the Mark Bir collection (our Auction #6), with his tag and original lot-tag #1127.
($100-150)