From PathfinderWiki

Silverdisks are small, etched silver disks frequently used in place of currency by the people of Numeria. They are presumably of alien origin, as they are found most frequently in or near the wreckage of spaceships (such as Silver Mount) that fell to Golarion during the Rain of Stars.1


  1. James Jacobs et al. (2011). "The Inner Sea". The Inner Sea World Guide, p. 143. Paizo Publishing, LLC. ISBN 978-1-60125-269-2