Even more round ...
How round is a round stamp, if the perforation is still there?
Technically speaking, those stamps are not really round then, at least not perfectly round.
They exist however! Perfectly round stamps.
They were issued in more countries, but Belgium is the country that i will show here.
You see a stucture with 9 circles and 20 lines. It shows an iron molecule. The same you might have seen before elsewhere in Belgium...
The Atomium is a monument in Brussels, originally built for Expo '58, the 1958 Brussels World's Fair. Designed by André Waterkeyn, it stands 102-metres (335 ft) tall. It has nine steel spheres connected so that the whole forms the shape of a unit cell of an iron crystal magnified 165 billion times.
The sheet above is dedicated to Belgian scientists, and is the 7th sheet in the series : "This is Belgium".
All stamps are auto-adhesive and round.
They are rarely seen on letters or postcards.
Face value per stamp is 70 cents. (now, 2011, 0,71 euro is required for a letter -50g within Belgium)
Finally, another round stamp from Belgium.
Issued in 2001, to promote philately.
This stamp is also auto-adhesive and was printed on sheets of 10.