1 Goldgulden - Rupert I

Rupert I of the Palatinate was one of four electors who formed the Rhenish League of Electors in 1354, a monetary union that standardized the gold gulden across the Rhine territories and effectively fixed its weight and fineness against the Florentine florin. This coin falls within that framework — the league's agreements were renegotiated periodically, and the 1366–1371 window corresponds to one such revised compact among the participating mints at Bacharach, Heidelberg, and their neighbors.

Felke 139 is well-documented within the type series but not among the more common die pairings from Rupert's long reign.