This is also another interesting bit of information about the stamps:
"Allenstein, 1920 (Scott #1)
Overprinted Germany Stamp
Allenstein (Olsztyn, in Polish) was a district in East Prussia (basically present day Germany). Following the end of hostilities of World War I, the population of Allenstein was allowed to determine whether they would be part of East Prussia or Poland.
As World War I ended, Allenstein was administered by the Allied Forces. The Treaty of Versailles, which marked the formal end of World War I, specified in Articles 94 and 95 that Allenstein could hold a vote to determine their national alignment. This vote for self-determination is called a plebiscite.
In April, 1920, 28 German postage stamps were overprinted with messages calling attention to the upcoming vote. The first 14 stamps were overprinted with "PLEBISCITE / OLSZTYN / ALLENSTEIN" while the second 14 read "TRAITÃ‰ / DE / VERSAILLES / ART. 94 et 95" referring to the Articles 94 and 95 of the treaty. Both overprints are shown nearby. The 14 stamps in each run are identical, except for which overprint was used.
On July 11, 1920, the plebiscite was held. Almost 98% of the voting population chose to remain with East Prussia. The area remained under German control until the end of World War II when it was subsumed by Poland, to which the area remains allied to this day.
The plebiscite stamps were not valid for postage very long. By August 20, 1920, they were invalidated. Thus the stamps, and hence the district's total stamp issuance, had a lifespan of not quite 5 months.
Interestingly, these stamps are not very expensive, in either used or unused condition. One would think that with such a short period of time and such a short period of postal validity that they would have achieved a certain rarity. However that is not the case.
The 28 stamps issued by Allenstein catalog for under $45 (US) for mint condition according to the Scott Standard Postage Stamp Catalog (2006). Used Allenstein stamps catalog for about double that amount. The bulk of the value for the Allenstein stamps comes from the two overprinted 15-pfennig violet brown stamps, Scott #4 and #18. Together these two stamps account for over half of the catalog value for the entire set.
For No. 1 collectors (those who collect the 1st catalog-listed stamp for a country), the first stamp should be easy to find for under $1 (US).
All in all, Allenstein stamps represent a fun little niche to collect. It is easy for any level of collector to afford the entire set of issued stamps." end-quote
The stamps obviously haven't come up in the copy but easy to find on google. http://www.stampsofdistinction.com/2008 ... stein.html
Hope this helps. Anne