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:

Day of use: 03. 06. 2009
 

Angličtina / English

Use translation by Google Translate (no guarantee).

Príležitostná ručná pečiatka používaná pri príležitosti 150 rokov od začatia priemyselnej ťažby a spracovania bridlice v Marianke (1859 - 2009)




Príležitostná ručná pečiatka používaná pri príležitosti 150 rokov od začatia priemyselnej ťažby a spracovania bridlice v Marianke (1859 - 2009)


Deň používania: 3. 6. 2009
Pošta:Mareianka
Farba: čierna
Autor: Peter Holenka




Zdroj: Slovenská pošta/POFIS


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