06 May (Netherlands ) within release Surprise stamps goes into circulation Se-tenant Se-tenant Pair face value 2*80 Dutch cent
Se-tenant Se-tenant Pair in catalogues | |
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Michel: | Mi: NL 1718-1719 |
Se-tenant is square format.
Also in the issue Surprise stamps:
Se-tenant Se-tenant Pair it reflects the thematic directions:
Holography is a technique that enables a wavefront to be recorded and later reconstructed. It is best known as a method of generating three-dimensional images, and has a wide range of other uses, including data storage, microscopy, and interferometry. In principle, it is possible to make a hologram for any type of wave.