Mainz, Bishopric, Johann I of Luxembourg (1371-73), goldgulden, undated, Bingen am Rhein, iohis ar* / * ep magv, Bishop enthroned, with wheel emblem on his chest, rev., moneta opidi pingensis, Mainz shield in trilobe, 3.44g, probably from an old hoard, very fine
(200-250 GBP)

The coin is of John II of Nassau and dates from circa 1400.  Estimate is unchanged