When blue is blue

Scientific treatise and study on the composition of the paint on the Protectorate 5h blue linden leaf stamp. Study of the dependence of the amount of paint on the color shade of postage stamps.

03. 05. 2025
Complete description

Commemorative Postmark:
XXX Slovak Philately Days 2013

XXX Slovak Philately Days 2013
Day of use: 14. 09. 2013
 
Post office: BYTČA 1
Colour: black

Angličtina / English

Use translation by Google Translate (no guarantee).

Príležitostná poštová pečiatka používaná pri príležitosti konania XXX. dní filatelie Slovenska v Bytči.


Text motifs: XXX. DNI FILATELIE SLOVENSKA / BITTCHA SIGILLUM OPPIDI

Pictorial motifs: Pečať mesta Bytča.

Autor: Ing. Miroslav Súkeník


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