10 Pfennigs - Schmalkalden (Gebr. Knauf Werkzeugfabrik) ND

One interesting fact about this coin is that it was made of iron, which was a unusual choice of material for coins at the time, as most coins were made of copper, silver, or gold. The use of iron in coinage was often seen as a sign of economic hardship or war-time scarcity, as it was a cheaper and more readily available material than other metals. The fact that this coin was made of iron suggests that the Prussian province of Hesse-Nassau may have been experiencing economic difficulties at the time of its production.