Watch List notes:

Mexico City, Mexico, 4 reales, Charles-Joanna, "Early Series," assayer R at bottom between pillars, PLVS without dots in rhomboid panel, rare. Nesmith 6d/6d type; S-M1; CT-72 type. 12.51 grams. Very bold pillars, full (weak) shield, nearly full legends, darkly toned and with light surface corrosion (otherwise XF), important as one of the dies that was used to transition to from assayer R to assayer P (but this decidedly just R--see lot 655 in this auction for the difference) and also the same design that was used for the famous 8 reales (three known). Recovered from: Unidentified ca.-1554 wreck off Santo Domingo, Dominican Republic
(1250 - 2000 USD)