The 5-cent Poland's Millennium commemorative stamp was placed on sale at Washington, DC, on July 30, 1966.
The stamp commemorates the most significant event in the history of Poland: its conversion to Christianity and the subsequent entry of the country into the mainstream of western civilization. The stamp is also a tribute to the traditionally friendly relations which have existed between the Polish and American people since the days of the American Revolution.
Designed by Edmund D. Lewandowski of Milwaukee, Wisconsin, the stamp is 0.84 by 1.44 inches in dimension and arranged vertically. The color of the stamp is red and white. 115,000,000 stamps in panes of fifty were printed on the rotary press.
Postal Bulletin (July 7, 1966).