First overprint run of the 1941 Međimurje unofficial local provisional issue was made with overprints of type A. The largest known overprinted pieces are blocks of ten (5 x 2).
The first look shows that the overprint plate was not constant. However, a detailed analysis shows that horizontal pairs of positions 2,3 / 4,5 / 7,8 and 9,10 overlap ideally but that distances between those pairs varies greatly.
In addition to my block I used three other blocks that I got from Mr. Philip Hughes.
Overlap of pairs on position 2,3.
Overlap of pairs on position 4,5.
Overlap of pairs on position 7,8.
Overlap of pairs on position 9,10.