Side note - the place name is Grunwald; the last character just has a fancy design. Lithuania also issued a circulating commem on that occasion - link only as it is kind of OT here: http://www.lb.lt/1lt_zalgiris (Grunwald is the Polish name of the location, Žalgiris is Lithuanian, Tannenberg would be German.) Christian
Some nice pieces there. What I also find interesting is that on these (PRL) coins the eagle design varied. Nowadays it has the same look on all coins, although the size (or the way it is "embedded") may vary ... Christian