Illustrated stamped envelope

The first Soviet illustrated stamped envelope (1953)

An illustrated stamped envelope (Russian: Художественный маркированный конверт) is a stamped envelope with an additional work of art on the face side of the envelope.[1]

References

1. каталог художественных маркированных конвертов (ХМК) СССР Archived 2012-12-04 at the Wayback Machine (Catalog of illustrated stamped envelopes of the Soviet Union, 1953–1991)