T-62 Main Battle Tank

World's first tank with 115mm smoothbore gun (1962–1975), outdoor exhibit St. Petersburg.

The T-62 was the world's first tank equipped with a 115mm smoothbore gun — a breakthrough weapon firing fin-stabilized projectiles with greater penetration than the T-55's rifled cannon. Produced from 1962 to 1975, it evolved from the T-55 while retaining a similar silhouette. Technically superior to its predecessor, it was quickly superseded by the more advanced T-64.