Denier 'Vierzipfliger'

The Laufenburg line of the Habsburg dynasty controlled strategic Rhine crossings between Basel and Waldshut, and their bracteate-style deniers reflect the monetary fragmentation of the Upper Rhine during the late Hohenstaufen period — each petty lordship effectively running its own currency. The "Vierzipfliger" type takes its name from the four-pointed or four-lobed form, a morphology that distinguishes it from the flat round pfennigs circulating in neighboring territories.

Wielandt's corpus for Breisgau coinage remains the primary reference for this series, and the 24a designation indicates a specific die state within a small documented group.