Lot 10011 – 1925 Prague Congress 50h postal stationery group of 5 essays with “NEPRODEJNE” handstamp

1925 Prague Congress 50h postal stationery essays (5) with different coloured inscriptions (some as issued), with accent missing from CONGRÈS being the noticeable difference as well as a violet “NEPRODEJNE” (“not for sale”) handstamp, with inscriptions in blue, black, brown, vermilion and violet, each cancelled by the special Congress cds, some minor discolouration or small creases, a unique group