Odd stamps : 09b hologram stamps

There aren't many countries that have issued holographic stamps or stamps with holograms.
But with a little bit of research, you can still find lots of great stamps for your collection.

In this second post, some more holograms:

First item is a sheet from Finland.
The sheet has 3 stamps and a hologram.
Infact the hologram itself isn't a stamp, but if the sheet was used completely on a letter, it can be found as an postally used philatelic item.

What's more special albout this sheet, is that it is cut like a "tangram" a game with 7 geometric shapes, put together as a square. Each of the single shapes can be formed by putting the other shapes in a certain order.
Also other forms can be made by putting each piece in another place.
A nice game and major brain-breaker.

Finland sheet with hologram

Finland - detail of the hologram

Another European country that has used holograms on stamps, is Germany.
In this set, dedicated to scientific discoveries, several stamps were decorated with holograms.

Two German semi-postal stamps on space science

Jupiter encountered by a comet

map of the sky, seen under gammalight

Science doesn't have to be boring as you see...