During the reign of Jan Kazimierz Szóstaki were broadcast by five mint:
Wschowska (1650)
Poznań (1651, 1657, 1661, 1662)
Krakowska (1656-1668)
Bydgoszcz (1650, 1660-1668)
Lwowska (1656, 1657, 1660-1663)
The standard of initial emissions-Bydgoszcz 1650, Wschowa 1650 and Poznań 1651-was determined by the ordinance from 1650. So the sixths were beaten with very good silver of the XIV-Lutal trial, on average weighed 1.869 Gi contained 1.635 g of pure crus ". The assumptions of the 1650 reform, however, proved to be unrealistic and soon, by the decision of the Sejm (1654), it was withdrawn from it.
During the Swedish Deluge in the Lviv Mint, sixths were beaten in 1656 and 1657. The legal basis was the Royal Universal from 1656, assuming that sixts should be beaten from Vi-Lutal silver, their average weight was to be 3.809 g, and the content of pure silver in the coin-as you can see earlier emissions). Until 1657, Krakow was in the hands of the Swedes. The Krakow Mint under the Swedish occupation was the sixths in 1656 and 1657. These were coins of a lower standard than the ordinance specified by the universal from 1656. Silver Vi-Lutwe was to weigh on average 3.480 Gi contain 1.305 g of pure ore.
The iconographic diagram of the sixths was relatively uniform. On the obverse they had a portrait of the king and a rim inscription with the name and title of the monarch. On the reverse, under the Crown were the coats of arms of Poland, Lithuania, sheaf of Wazów and the inscription. Additionally - Treasury coats of arms (on the obverse or reverse), initials of mint managers, date. The exception is the first emissions - Wschowskie (1650), Bydgoszcz (1650) and Poznań (1651). Instead of the coats of arms of Poland and Lithuania, there was only a Polish eagle with the Snopek coat of arms on the reverse (one of the Bydgoszcz varieties from 1650 has a standard scheme on the reverse with the coats of arms of Poland and Lithuania).
