1,000 Polish mark banknote , May 17, 1919, Series X, 6-digit serial number (the last series of this variant).
A variant with a single-letter series and 6-digit serial numbering. Printed on paper with a honeycomb watermark. A less common series; among many paper currency researchers, the prevailing view is that this series (X), as the last series of this variant, was a replacement series (?).
An acceptable piece, showing signs of circulation, with three vertical folds—including the central one, which already has gaps in the paper—as well as tears and spots along the edges of the banknote.
References: Miłczak 22b



