Watch List notes:

Poland 5 Zlotych 1928 Y#18 GEF/AU, rare and considerably under-rated by Krause, we note at the time of writing, only four other examples available online, all significantly inferior to this piece and priced from £140-£250. Our archive database stretching back 17 years, shows we have not previously offered another piece

Estimate: 400-600 GBP