Karl I of Austria, Czechoslovak Overprint

Czechoslovakia · 1919 · 15 hellers

A green stamp featuring a profile portrait of Emperor Karl I of Austria, overprinted diagonally with 'ČESKO-SLOVENSKÁ POŠTA 1919' and the denomination '15 hellers'.

This stamp represents a provisional issue by the newly formed Czechoslovakia in 1919, utilizing existing Austro-Hungarian stamps overprinted to reflect the new nation's sovereignty following the dissolution of the Austro-Hungarian Empire.