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:
Inauguration of the postage stamp Cultural heritage of Slovakia: SPU in Nitra

Inauguration of the postage stamp Cultural heritage of Slovakia: SPU in Nitra
Day of use: 17. 01. 2017
 

Angličtina / English

Use translation by Google Translate (no guarantee).

Commemorative postmark used in Nitra on the occasion of the inauguration of the postage stamp Cultural heritage of Slovakia: SPU in Nitra.


Text motifs: UVEDENIE POŠTOVEJ ZNÁMKY / SPU

Pictorial motifs: Detail fasády Slovenskej poľnohospodárskej univerzity (SPU) v Nitre.

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