1933 Latvia Airmail semi postal stamps, sold to raise funds for wounded aviators. One of several series of gorgeously engraved stamps depicting planes and other flying machines. : r/philately

Sparks Auctions Sale - 32 Page 69

Air Stamps–Heavier than Air: Biplanes, Monoplanes, Jets & Helicopters

Latvia 1933 Sc CB15 Air Semi-Postal Stamps Wounded Aviators II

Sparks Auctions Sale - 32 Page 69

Notable and beautiful: The 1933 airmail semipostal stamps of Latvia

Postage stamps and postal history of Latvia - Wikipedia

the 2 early flying machines : r/PlaneCrazyCommunity

Sparks Auctions Sale - 32 Page 69

the 2 early flying machines : r/PlaneCrazyCommunity

Stamp forgeries of Latvia Stampforgeries of the World