Presently working on my WWII stamp collection, Part 3 "Axis Powers".
Did the Hungary War stamps of this section and starting inventory on Bulgaria WWII stamps. Compared to other Countries, excluding Hungary and others.....they do not have much value....they are "penny stamps"
Here is a Feb 28, 1944 set, Sc # 434-438. Only the last one is worth a little more....still under 50 cents - but nice stamps, MNH-VF