Use of butterfly franking machines after the liberation of Czechoslovakia

Use of franking machines with a payment block in the shape of a butterfly (FRANCOTYP) after the liberation of the Czechoslovak Republic in 1945 with emphasis on the territory of Slovakia

21. 09. 2020

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09. 01. 2017

Minerals on stamps (II.) - International Year of Crystallography

The second part of the interesting overview of postage stamps devoted not only to minerals and mineralogy but also to other related areas (gemmology, crystallography, meteoritics) as well as personalities, museums with expositions of minerals, precious stones in crown jewels, etc.

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ZSF - Union of Slovak Philatelists