2 Gulden Siege coinage, Klippe

Frankenthal was a fortified Palatinate town that held out against Spanish Imperial forces during the early phase of the Thirty Years' War. This klippe was struck inside the besieged city in 1623 as conventional coin supply became impossible — siege coinage by definition exists because normal minting infrastructure had broken down. The Spanish blockade was tightening, and the garrison needed a functioning medium of exchange for pay and provisioning within the walls.

The square flan is not decorative affectation. It reflects emergency production: strip silver cut into planchets rather than rolled and punched into rounds.