1 Goldgulden - Froben of Mösskirsch

The County of Helfenstein-Gundelfingen was among the smallest and most financially marginal of the imperial counts in Swabia, and its coinage rights were exercised so rarely that a single Goldgulden issue could represent the entirety of a reign's gold output. Froben of Mösskirsch held the county during a period when minor imperial estates frequently minted prestige gold pieces less for circulation than to assert their status within the Holy Roman Empire's fractured hierarchy of sovereignty.

Fr#1189a suggests this is a variety distinction within an already vanishingly small issue — the Friedberg catalog's assignment of a lettered subtype to a county of this obscurity implies the total surviving population is measured in single digits.