Estonia 1928 Airmail Imperforate Proof Blocks

Estonia · 1928 · 10 Marka, 15 Marka, 45 Marka

This set of imperforate proof blocks features Estonia's 1928 airmail issue. The designs depict a Junkers F 13 monoplane in flight over a map of Estonia, symbolizing the nation's early advancements in civil aviation. The three denominations (10, 15, and 45 Marka) are shown in their respective colors.

Issued during Estonia's first period of independence, these stamps facilitated international airmail services, connecting the young republic with the rest of Europe and highlighting its modernity.