The Swiss governement has recently launched an amazing poster database. You can find there about anything that has been published and archived in Switzerland, even though some images are still missing.
I’ve been doing some research with the names of some designers I like and putted it under here, enjoy!
Ruedi Baur
Roger Pfund
Joseph Mueller-Brockmann
Werner Jecker
About the Author
Mirko Humbert
Mirko Humbert is the editor-in-chief and main author of Designer Daily and Typography Daily. He is also a graphic designer and the founder of WP Expert.