Vikariats Thaler
A type of Thaler, like the Sede Vacante coins, struck during an interregnum. They occur among the Electors of Saxony and those of the Pala- tinate from 1612 to 1741, and usually have the title VICARIVS as part of the inscription.
Source: Frey's Dictionary (American Journal of Numismatics, Vol. 50, 1916)