1962 Dag Hammarskjold Invert 4c Black, Brown, and (inverted) Yellow

1962 Hammarskjold Error 4c
1962 Hammarskjold Error 4c

This stamp commemorates U.N. Secretary General Dag Hammarskjold.

It was purposely issued with the yellow inverted so that every collector could own an “error” stamp. The white patches indicate the error.