Charity stamps over 0, 50 1, 50 and 1 3 Din. With "Network excess pressure tips downward" as well 2 6 Din. With "Network excess pressure tips to the top" and 4 12 Din. With "Network excess pressure tips downward" from the set "Aid for Serbian prisoners of war" on official First Day Cover cover with First Day special cancellation BEOGRAD from 5.12.41