Socialist heraldic designs, the earliest examples going back to late 19th century organizations and fraternities, display a fascinating mixture of observance to established rules of heraldry and consciously rebellion against these rules. Beside is an emblem painted by Walter Crane for “The World Order of Socialists”, a fraternity/trade union I believe only existed in his mind.* The heraldic shield is substituted for the rose, which at the same time functions as a kind of mantling. The handshake, typical for trade union iconography, stretches over the entire globe, divided in rational quadrangles. The sun is rising.
Althistory (!) displays old Soviet coats of arms that seem to be authentic. In particular I find “Azerbaijan SSR 1920-1927” fascinating. The way the communist sickle and Muslim crescent have been arranged is lovely. But where is the picture from? A note?** Even though the heraldic supports are a worker and a farmer, this emblem have a rather conservative appearance.
Finally, most experimental and rebellious, is the coat of arms for a Hungarian city, designed in the 1970s.*** Op art goes commie.
* If I remember correctly, I found this emblem at Whitworth Art Gallery, but I am unable to locate it again. I know from experience that their search engine works arbitrarily. ** I have tried to contact the person who posted all these coats of arms, but unsuccessfully so. *** Slater & Znamierowski, The Illustrated Encyclopedia of Flags and Heraldy, p. 465.