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The Ewiger Pfennig or eternal penny (Latin: denarius perpetuus) was a coin of the regional pfennig period (bracteate period), which was minted until the late medieval groschen time. These coins are mostly of the Hohlpfennig or "hollow pfennig" type which, unlike bracteates, had to be exchanged regularly for a fee but were not subject to annual recall of coins in circulation, the Münzverr

The Wechselthaler, also spelt Wechseltaler or Wechsel-Thaler ("exchange thaler"), was minted in 1670 and 1671 in the Electorate of Saxony under Elector John George II (1656–1680) to the Wechselthaler or Burgundian thaler standard (861/1000 fineness). As the name suggests, the Wechselthaler and its subdivisions were intended as a currency to encourage Leipzig's trade with Hamburg and th