There's something very aesthetic about 30s-40s colour photography (the original colour photos, not coloured in b/w), especially from nazi Germany, that seemed to be quite ahead in colour photography, although Russia also knew pioneering work, especially from Sergey Prokudin-Gorsky. However, the Russian photos were made from 3 separate colour-filtered monochromatic photos, whilst (I think) the German ones were made with real colour film.

Would anyone happen to know more about what processes were used? I'd like to know how they were made and what caused the specific aesthetics.

https://www.shockblast.net/hugo-jaeger-photography/
http://rarehistoricalphotos.com/color-photos-from-nazi-germany/
http://www.gridenko.com/pg
http://mashable.com/2014/09/30/russian-revolution-in-color/#_Co1PDkLSkqk