The Spanish “pieces of eight” come to mind and some of those are in pretty good shape after hundreds of years on the seabed. Maybe the numismatic value of the coins in this case was not there.
“The Spanish “pieces of eight” come to mind and some of those are in pretty good shape after hundreds of years on the seabed.
Th difference being that these coins (like ALL “modern” silver coins say 1850 on) contain at least *some* copper for toughness (even US silver Eagles contain copper)—in this case 50%) and copper corrodes to a nice color but a rotten numismatic outcome in seawater.