Very rare pattern. Currently the fifth known piece.
It is an interesting pattern in that all pieces known so far are on banknotes with the same series number 0312707, and differ only in the two-number numbering (described by Czeslaw Miłczak as "technological") placed in the watermark in the margin.
Only four pieces of such designs are recorded in Miłczak's catalog, with numbers: 7-12, 13-18, 14-19 and 16-21. The present one with number 1-6 is currently the fifth known and the only one with numbering consisting of two single-digit numbers.
The banknote is beautifully preserved, practically in issue condition and without the usual deflections, but it does have the characteristic fading (imprints) visible in sidelight (additional photo). Probably resulting from the way it was prepared for presentation purposes or for distribution, and this feature is often found precisely on the patterns of the 1919/24 issue. Other than that, no remarks.
Presentation beautiful. Full issue freshness.