Siemens Nixdorf Musterbanknote 10

Siemens Nixdorf produced this test note in-house to calibrate and validate its automated banknote processing and ATM hardware — it was never issued by any monetary authority and holds no face value. The company, formed from the 1990 merger of Siemens Data Systems and Nixdorf Computer AG, was at the time a significant supplier of cash-handling equipment to European banks navigating the transition toward machine-readable currencies and, later, euro-era processing standards.

The "Musterbanknote" designation simply means specimen or sample note. Numbered series in this range were used internally and distributed to banking clients for machine-testing purposes, which means survival rates depend almost entirely on whether the recipient bothered to keep one after the equipment was decommissioned.