Holland"Europeesche Ptt Vereniging 29 Oktober 1942"Overstamp

What exactly does it say? What is being celebrated? The overstamp is golden, so must be something important>

On the date printed on the stamp the European Postal Union held a meeting in Vienna, Austria.
It is noteworthy that this "overprint" was not made on an existing stamp but on a reprint (?) of a 1923 stamp. The original stamp was smaller in size and in a different color ( green ).
Maybe one of our Dutch forum friends knows more about this issue.

Peter

In 1942 most of Europe (except Ireland,Iceland,Spain, a chunk of France,Sweden) were either occupied by Germany, influenced/allied with Germany or fought the war. So what was the point of this meeting?

German Idea of ALL IS NORMAL!

It is simply what it appears to be, warrehouse is probably spot on.

This stamp was issued in January 1943 to commemmorate the creation of an European Postal Union in Central Europe. Its members were German allies or countries occupied by Germany: Albania, Bulgaria, Croatia, Denmark, Finland, Germany, Hungary, Italy, the Netherlands, Romania, San Marino and Slovakia (interestingly France was not among the members). They did meet in Vienna, but the war had already progressed to an extent that any potential further meetings had little to no value.

With regards to the stamp itself; it was indeed a reprint of a 1923 green 2,5 cents stamp. There is even a misprint; on one block of 100 stamps no overprint was present. So if you have a yellow 2,5 cent stamp without an overprint you might have something. As it is, common although very interesting stamp.