20 Kreuzers - Maria Theresia Graz

Maria Theresia's monetary reforms of the 1750s and 1760s restructured Austrian silver coinage around the Conventionsthaler standard, a system negotiated with Bavaria in 1753 that defined coin weights relative to the Cologne mark. The 20 Kreuzer fitted cleanly into that arithmetic as a third of a Gulden. Graz, as the capital of Inner Austria and seat of a long-established mint, remained one of several provincial facilities sharing production of the type across this period — hence the date range rather than a single year.