Watch List notes:

Potosi, Bolivia, cob 1/4 real, Philip IV, no assayer, very rare. 0.46 gram. Small and unassuming (also somewhat corroded), this is a very important coin in that it shows a tiny lion without shield and a large checkerboard-style castle in shield (both off-center) matching punches that were not created until well into the 1620s, thereby placing this coin within the Philip IV type, which was totally unknown and unexpected in this denomination until this coin came along. ($2000-3000)