This piece of financial history is now estimated $ 25K to 30K for sale by Spink in New York on January 13, lot 334. Its serial number leaves no doubt that it is the same unit. Here is the link to the press release of the next sale.
I discussed it as follows in 2013 :
The banknote, that piece of paper which can be redeemed against metal coins, is highly attractive to the financiers. The first of them who have tried this system did not anticipate its dangers. The bankruptcy of Law in France in 1719 will result from a similar mechanism as the liquidation of the bank of Palmstruch in Stockholm in 1667.
Sweden had a monetary system constituted by coins in copper and silver. It was felt necessary to counter the hoarding of silver which would create a disparity with the same face value in copper. Palmstruch created the Stockholms Banco in 1657. In 1661, he issued the first banknotes ever printed in Europe.
The remedy was worse than the disease. The early success of the program led to such an excess of paper that it made it impossible to restitute the equivalent metal to the bearer when speculators had increasing doubts about the sustainability of the system.
The first banknotes emitted by Palmstruch were based on copper, with values of 5, 25, 100 and 1000 daler. In 1666, the Stockholms Banco adjoined silver notes of 10, 25, 50 and 100 daler.
The piece for sale is a 10 daler silvermynt note signed in May 1666 by no less than eight employees of the Banco and authenticated with blind stamps of the bank. In very fine condition, it is one of the best surviving examples.