Proof print acting as an "acceptance pattern" from the preparatory phase of emigration banknotes.
Print fully completed, in colors consistent with the accepted one.
Made on paper with a watermark different from the one finally approved for this denomination (this watermark was finally used on the 10 zloty bill of the emigration issue).
Zero numbering, typical of technological acceptance patterns.
Very rare (unique) item in beautiful state of preservation, with only very slight bending of both lower corners.
Definitely recommended.