I have recently been contacted by the blog stickerkitty.
This blog has some great stickers along with cracking analysis. Subjects include anti-apartied movement, anti-fascism at St. Pauli FC, 1920’s US political stickers and the Industrial Workers’ of the World.
St. Lawrence’s The Richard F. Brush Art Gallery has a digital collection of street stickers.
Check both of these out!
Archivist
Anti-Fascist Archive 
Hi thanks for your awesome archive, but I’ve spotted a typo: It’s the Industrial Workers of the World, not “International”. An easy mistake to make, but maybe worth changing 🙂
Thanks!