Watch List notes:

Potosi, Bolivia, cob 4 reales, 1667E. S-P37a; KM-18. 11.37 grams. Bold waves, off-center cross, two dates, minimal corrosion but very dark all over. Pedigreed to the Mark Bir collection (our Auction #8, with original lot-tag #625). Recovered from: Unidentified ca.-1671 wreck in Seville Harbor
($150-225)