Poland

Printed on pale blue with lighter typeface, perforated.

Günther Mair catalogue: POL-A-8b (1970)

 Printed on sky blue with medium typefaces, perforated.

Günther Mair catalogue: POL-A-11 (1994)**

Printed on sky blue, imperforated.

Günther Mair catalogue: POL-A- (?)