Finland YYA Treaty 25th Anniversary

Finland · 1973 ·

This stamp commemorates the 25th anniversary of the Agreement of Friendship, Cooperation, and Mutual Assistance (YYA Treaty) between Finland and the Soviet Union. The design prominently features the stylized text 'YYA 25' to mark the quarter-century milestone.

The YYA Treaty, signed in 1948, was a pivotal agreement that defined Finno-Soviet relations for over four decades. It was the main instrument of Finland's Paasikivi–Kekkonen Line, a policy of neutrality and good relations with its powerful eastern neighbor during the Cold War.