A Bydgoszcz sixpence of John Casimir with an imprinted countersign of the Potocki family.
A coin that served as substitute (dominal) money in one of the Potocki landed estates in the 18th-19th centuries.
During this period, some estate owners used old, worn-out and withdrawn from circulation state coins for payments on their lands, stamping them with ownership punches. They are encountered on various denominations, such as the shekels of August III, or Poniatowski's pennies.
An interesting item showing how long the old money was in circulation and its various uses
