500 000 Mark Kreissparkasse

The Kreissparkasse des Landkreises Linden was one of hundreds of district savings banks that issued emergency currency — Notgeld — during the hyperinflation of 1923, when the Reichsbank's output simply could not keep pace with denominations climbing into the millions. By August of that year, half a million marks was barely enough to buy a loaf of bread, which meant notes at this level had a functional lifespan measured in days before the denomination itself became insufficient.

The guilloche underprint was a rudimentary anti-counterfeiting measure, though with inflation accelerating weekly, the economic incentive to forge any given denomination evaporated almost as fast as its purchasing power.