0, 50 1, 50 - 4 12 D. Prisoners of war, 4 values complete, always in the horizontal strip of four with the types I / III / II / IV, . 0, 50 1, 50 D. With Network excess pressure "tips to the top", the rest values overprint "downward", in perfect condition mint never hinged with typical Serbia gum, in this kind rare, Michel 500.-