Banknote in visually nice, natural state of preservation with a few folds and the only, small tear in the margin.
Original banknote with typical circulation numbering. Bearing a MODEL overprint from a later period, most likely in the 1970s on a collector's inch (colloquially known as the "Kaminski pattern").
Such later-period MODEL overprints are usually found on common and numerous issues preserved in good condition, such as the August 1919 marks, or the IIRP issues in circulation at the outbreak of WWII.
They are rarely seen on rarer banknotes, such as the February 1919 100 mkp, undoubtedly - on this banknote we see this imprint for the first time.
