1943 ŠIBENIK - Hand overprints

I don't have much blogging time lately, I have to finish some projects at work, while already preparing an article about 1943 Šibenik hand overprints - probably the most difficult overprinted issue I studied so far.

I have a double size sheet with 200 overprinted stamps what is a unique source for the study. Due to the rubber stamp each overprint depends on: a) the amount of the color, b) the strength of the print and c) the angle and the rotation under which the stamp hit the base.

1943 Šibenik local provisional issue, 50 cent double sheet (2x100) with hand overprints. 

Enlarged detail, showing some of the overprint variations.