German official stamps with C.G.H.S. overprint

Plebiscites - Górny Śląsk (Upper Silesia)
Fischer U 1-7 | Michel 1-7 (Deutsche Abstimmungsgebiete - Oberschlesien - Dienstmarken) | Year of issue 1920

The stamps in this issue have the number "21" displayed in one or two corners.

U 1

U 2

U 3

U 4

U 5

U 6

U 7

German official stamps with C.G.H.S. overprint

Translations

Dienstmarke is German for: Official stamp.
21 refers to the year 1921.
C.G.H.S. is a French abbreviation for: Commission de Gouverment Haute Silésie (Government Commission for Upper Silesia).