Dear Stamp Community Family
I have found this strip of three stamps in a bunch of stamps of italy.
I've checked my italian catalogues as well as some Websites but did not find the Information I am looking for.

The man on the middle stamps is the Dux (Duce) Mussolini. The badges on the left and right stamps are the "coat of arms" of the National Fascist Party of Italy (Partito Nazionale Fascista). The inscription "Fascio di combattimento" literally means "Italian combat organizations" (known as the blackshirts). And "Anno XX" is the year 20 of the fascist era in italy (this lasted from October 29, 1941 to October 28, 1942). No value printed on any of the three stamps.
Are these stamps maybe revenue or fiscal stamps? For what kind of tax?
Or are these "stamps" for the party contributions?
Or are they just propaganda stamps?
I am excited to see what the experts in this forum can tell me about these stamps.
Best regards from Switzerland
André