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:
3rd Regional Day of the Slovak Postage Stamp 2017 in Dolny Kubin

3rd Regional Day of the Slovak Postage Stamp 2017 in Dolny Kubin
Day of use: 09. 12. 2017
 
Post office: DOLNÝ KUBÍN 1
Colour: black

Angličtina / English

Use translation by Google Translate (no guarantee).

Commemorative postmark used in Dolny Kubin on the occasion of the 3rd Regional Day of the Slovak Postage Stamp 2017 in Dolny Kubin


Text motifs: III. REGIONÁLNY DEŇ SLOVENSKEJ / POŠTOVEJ ZNÁMKY

Pictorial motifs: Evanjelický kostol v Dolnom Kubíne.

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