1932, Moscow Philatelic Exhibition, Specimen of the ''Kartonka'' souvenir sheet, size 169x119mm, pre-printed at the top with text: ''Obrazets k Dokladu V C I K No. 16832'', officially signed, extremely fresh condition with very slight internal paper wave, practically perfect corners, no gum as produced, NH, VF and definitely unique item, Z. Mikulski certificate (Image)