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Musterbanknote 20

发行方	Siemens Nixdorf Informationssysteme AG
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类型	Local banknote
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正面描述	Test or specimen note issued by Siemens Nixdorf Informationssysteme AG, with the company's logotype printed in bold black at the upper left on a plain white field. The central portion carries an intricate teal guilloche underprint over which the diagonal legends MUSTERBANKNOTE, TEST NOTE, and SPECIMEN appear in teal letterpress. A large numeral '20' in teal occupies the lower left, while a vertical teal band at the right margin bears the inscription MUSTERBANKNOTE and an order reference number.
正面铭文	MUSTERBANKNOTE TEST NOTE SPECIMEN Siemens Nixdorf Informationssysteme AG MUSTERBANKNOTE 20 Bestellnummer 28125.00.3.93
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备注	Siemens Nixdorf Informationssysteme AG produced test notes like this one for calibrating and certifying currency-handling machines — cash counters, sorters, ATM validators — rather than for any monetary purpose. The firm, formed by the 1990 merger of Siemens' data systems division with Nixdorf Computer AG, was at the time one of Europe's largest producers of banking automation equipment, and internally produced standardized test media to verify optical and mechanical sensors across its product lines. "Musterbanknote" simply means specimen or sample banknote in German. These were never intended to leave the engineering environment.