Siemens Nixdorf 500 DM Test Note

Siemens Nixdorf produced these test notes internally to calibrate and validate banknote processing equipment — sorters, counters, and authentication machines marketed to central banks and commercial institutions. They were never intended to enter circulation and carry no monetary value by design. The paper and print tolerances were engineered to replicate Bundesbank specifications closely enough to stress-test the machinery under realistic conditions.

Survival outside the factory environment is largely accidental. Notes that escaped destruction are genuinely uncommon collector pieces, though their value sits entirely in the industrial history, not in any issuing authority.