OQ5DZ 1950 Belgian Congo

Notice the QTH on the card as Ruanda-Urundi. The DXCC entity of Ruanda-Urundi was only credited from July 1, 1960, to June 30, 1962.

June 1960: Belgian Congo becomes independant as Democratic Republic of Congo.
Oct.1971: Democratic Republic of Congo changes into Republic of Zaire.
May 1997: The name was changed back from Zaire to Democratic Republic of Congo.

From the estate of W3EVW