Regarding the Jung art my guess is that it is the psychotherapist (not 100% sure though and judging by the looks of his other art). Guess when he was in his 60's Jung had something to do with restructuring the Allgemeine �rztliche Gesellschaft f�r Psychotherapie according to Wikpedia.
I found a few more cards to post.
#1 was posted to M�hlhausen.Inside the backs decorative border is a line- Die treue ist das mark der ehre.