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
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Other news:
PF 2017 - successful properly preforated 2017

PF 2017 - successful properly preforated 2017
Author: Vojtech Jankovič
Source: www.postoveznamky.sk
Published: 30. 12. 2016 01:30

Angličtina / English

Use translation by Google Translate (no guarantee).

PF 2017 by the editors of www.postoveznamky.sk.



Redakcia

www.postoveznamky.sk


vám želá

všetko dobré a zdravé a veselé a úspešné a samozrejme správne zúbkované


počas celého roka 2017 a mnoho dôvodov na filatelistický úsmev.*


PF 2017 - úspešný zúbkovaný rok 2017



* Zúbkovanie od ucha k uchu! 😀


Author: Vojtech Jankovič
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