1⁄48 Konventionsthaler - Maria Theresia

Burgau was a tiny Habsburg margraviate wedged between Bavaria and the Swiss Confederation, administered directly from Vienna after Maria Theresia consolidated its governance in the 1750s. These billon pieces were struck as the margraviate's local coinage nominally conformed to the Konventionsfuss — the monetary convention Austria and Bavaria agreed to in 1753 — though at this fractional denomination the silver content was thin enough to render that convention largely theoretical.

The Herinek reference numbers 753–757 indicate at least five distinguishable die varieties across the production run, typical of small-territory issues where die consistency was loosely supervised.