Indo Danish, Copper 4 Kas, 2.23g, Frederick VI (1766-1808 AD), 1824 AD, Unique Dual Error Coin, Retrograde Denomination & Over Struck Error, “IV KAS” wrongly minted as “VI KAS” and then again over struck improperly with the correct denomination, resulting in both denominations visible at 3’O clock rotation, Obv: “VI KAS” wrong denomination improperly overstruck with “IV KAS” correct denomination, Rev: Monogram of Frederick VI, KM 150 overstruck on KM 151. Very Fine, Unique. View Lot Details