Czechoslovakia, 1981, 4 Kc. 11 (1/2) х 11 (1/4). multicoloured

Catalogues:
Michel: 2633
POFIS: 2505
Scott: 2378
Stanley Gibbons: 2593
Yvert et Tellier: 2456

Iluustration of Étienne Delessert to his tale «How the Mouse Was Hit on the Head by a Stone and So Discovered the World».

Plots: Delessert Étienne. «How the Mouse Was Hit on the Head by a Stone and So Discovered the World»