Poland #NB28-32 and NB36-40, 2 complete German Occupation semi-postal sets on piece with special commemorative cancels. 

Scott Catalog value for used $ 12.75.

Bold 1944 Krakow cancels commemorate the 5th Anniversary of the "General Government" in occupied Poland.   Buy now at $ 4.95 or make offer.  Postage discounted for purchase of multiple lots.

Buy with confidence--44 year member American Philatelic Society.