Regarding the blue stamp:
Southern Ukraine, February 3, 1944. These were temporary stamps of the Ukrainian Provisional Post. They were valid until March 26, 1944 and were issued without gum. They were issued after the withdrawal of the German Official Post, which occurred simultaneously with the retreat of the German Wehrmacht.
See also:
http://www.geophila.cz/geophila/esh...k-Ukr-falsum (i.e. fake).