Wow, well done....thanks for posting. Do you have the source for these (link)?
I was just sent them, but googling the colourist's name (Mikolaj Kaczmarek - you can see it in many of the photos) brings up this Facebook page:
https://www.facebook.com/KolorHistorii/ on which I was pleased to learn the little girl in the first image survived the war and lived peacefully in France afterwards.
There's a massive trove of work in there, probably 120+ war photos and another 50-60 colourized portraits of Polish figures from various periods. The war images include some pictures from 1939 as well as images from the Soviet-Polish War (no combat images for the last one). Apparently the artist does this sort of work professionally for institutions (museums, etc.), and deservedly so.
If anyone's looking to Polish uniforms, it's an incredible resource. There's a fair number of German photos sprinkled in too.