Thailand
Rama IV copper Proof Pattern 2 Baht ND (1868) PR58 NGC, KM-PN30. Plain Edge - Coin Alignment. An extremely rare pattern in copper of this coveted large denomination, with a choice presentation for the grade, showing few marks in the fields, edges that have avoided major dings and pleasing deep brown coloration over the surfaces. While we have seen examples of this type in nickel and copper-nickel (those also appear to be very rare), this is the first instance we've seen struck in copper.
Estimate: 3000-5000 USD