Kunstanstalt JUNO, Berlin

In 1920 the address was 53 Dorotheenstrasse as shown in the advert in Das Echo. The example card is earlier, from 1906-1908, when Juno was a member of the PRA; later JUNO was a member of the NBC -see here.

At this link there is a large collection of illustrations of KJuno cards, with many of the subjects identified.

K Juno advert 1920 (page 1109)
K Juno 396-4
K Juno 396-4 (verso)