PRAHA, Czechia (Czechoslovakia). Special postmark (1971)

CZECHIA.

CZECHOSLOVAKIA (Czechia).

Special postmark:

PRAHA
UNESCO
18.03.1971

UNESCO / Paris, FRANCE. First day postmark (1980)

UNITED NATIONS. Unesco. / FRANCE.

First day postmark:

PREMIER JOUR
UNESCO
PARIS
15.11.1980.

KÖLN, Germany. Postage meter (1970)

GERMANY.

Postage meter:

DEUTSCHE BUNDENPOST
030 (Mk)

KÖLN 1  /  5
13.11.1970.

UNESCO
Deutsche UNESCO-Kommission