⅔ Thaler - Max Gandolf von Kuenburg City of Brunswick, Countermarked

Max Gandolf von Kuenburg, Archbishop of Salzburg from 1668 to 1687, was an aggressive centralizer who clashed repeatedly with the prince-bishops and free cities of the Holy Roman Empire over monetary authority. The Brunswick countermark on this piece reflects the fractured currency reality of late seventeenth-century Germany, where municipal and territorial authorities routinely restamped foreign silver to validate — or revalue — it for local circulation. Brunswick's countermarking practice was not casual bureaucracy; it was a direct assertion of economic jurisdiction over coins that would otherwise circulate at contested rates.

The Zöttl reference places this among a well-documented but numerically limited group of Salzburg issues bearing external municipal countermarks.