Salone Internazionale del Mobile

Salone Internazionale del Mobile is an annual furniture showcase in Italy that started in 1961 in Milan.  Most of these event posters are from the late 60s-70s, and display some really nice classic Italian design.

via Dwell

Swiss Poster Designs by Daniel Peter of Detektiv Bureau (Lucerne)

Member of the design studio Detektiv Bureau, Daniel Peter is a Swiss graphic designer working out of Lucerne and Zurich.  His work is clean yet very playful -- He has a nice crisp feeling to his work but can bring out a lot of 60's and maybe 50's character.

Colorful Posters and Swiss Typography by Bisgrafic (Barcelona)

Bisgrafic is a design studio in Barcelona that creates very clean posters and flyers with bold colors and clean Swiss typography.  Check out their website, Flickr and Twitter for more.