In 1646 a ship, loaded with iron bars, was wrecked in the archipelago of Gryt in Östergötland. In the cabin there was a chest containing nearly two thousand Swedish copper coins. Furthermore, five newly issued plate money coins were kept in the cabin. The denomination of each one of them was 10 daler sm, four of them were struck in 1644 and one in 1645, during the reign of Queen Christina of Sweden. The lack of silver in Sweden at the beginning of the 17th c. was the main reason why copper coins were brought into production, the first ones being issued in 1624 in low denominations. As many as 26 539 plate money coins with the denomination of ten daler sm were minted during 1644. In 1645 only 235 pieces were struck until the production ceased. The centre stamp shows X DALER Sölff:Mnt (10 daler silver coin) and the mintmaster’s mark, Markus Kock. The corner stamps show a royal crown and the initials C R S (Christina Regina Sveciae = Christina, the Queen of Sweden) 1644.
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