Issued by the Soviet Union in 1961, this 4 kopeck stamp commemorates “Неделя письма” (Letter Writing Week). The design captures the importance of communication across vast distances, featuring an airplane, helicopter, ship, and train — symbols of postal transport linking the USSR. The central motif shows an airmail envelope marked “Авиа” alongside the slogan promoting correspondence. Printed in deep carmine-red tones, it celebrates the Soviet postal network’s efficiency and the cultural value of handwritten letters during the early space-age era.