Postage stamp from Ghana

 

Postage stamp from Ghana devoted to Africa Freedom Day  

https://im-possible.info/english/art/stamps/ghana-1960.html

Stamp from Azerbaijan

 

Postage stamp from Azerbaijan  

https://im-possible.info/english/art/stamps/azerbaijan-2006.html

Stamps from Israel

 

Postage stamps from Israel with impossible weaving  

https://im-possible.info/english/art/stamps/israel-1989.html

Postage stamp of Uruguay

 

Postage stamp from Uruguay  

https://im-possible.info/english/art/stamps/uruguay-1975.html

Postage stamp from Israel

 

Postage stamp from Israel with David star in form of two interconnected impossible triangles.

https://im-possible.info/english/art/stamps/israel-2015.html

Postage stamp from Italy

 

Postage stamp, which was issued by Post office of Italy in 1990  

https://im-possible.info/english/art/stamps/italy-1990.html

Postage stamp from Portugal

 

Postage stamp from Portugal with impossible arch  

https://im-possible.info/english/art/stamps/portugal-1975.html

Stamp from Oman

 

Postage stamp from Oman  

https://im-possible.info/english/art/stamps/oman-1986.html

Hungarian stamp

 

Hugarian stamp with poster by Istvan Orosz  

https://im-possible.info/english/art/stamps/hungary-2003.html

Postage stamp from Germany

 

Postage stamp with impossible cube from Germany  

https://im-possible.info/english/art/stamps/germany-2019.html

Crypto stamps from Liechtenstein

 

Crypto stamps from Liechtenstein  

https://im-possible.info/english/art/stamps/liechtenstein.html

Stamp block from Hungary

 

This block was issued in Hungary in 1999

https://im-possible.info/english/art/stamps/hungary-1999.html

First day cover

 

First day cover with postage stamps with impossible figures by Oscar Reutersvard.  

https://im-possible.info/english/art/stamps/reutersvard.html#fdc-2

Stamp from Switzerland

 

Stamp with impossible triangle from Switzerland  

https://im-possible.info/english/art/stamps/helvetia.html

Postage stamps from Netherland

 

Postage stamps from Netherland  

https://im-possible.info/english/art/stamps/netherlands.html#jos-de-mey-5

Belgium postage stamps

 

Postage stamps with illusions from Belgium  

https://im-possible.info/english/art/stamps/belgium-2014.html

Postage stamps from Netherlands

 

Postage stamps from Netherlands  

https://im-possible.info/english/art/stamps/netherlands.html

Syrian postage stamp

A postage stamps from Syria  

http://im-possible.info/english/art/stamps/syria-2008.html