AKA Hollenstein Phototypo or Studio Hollenstein, a phototype firm run by Albert Hollenstein and active until 1978. See various catalogs at Peter Gabor. More info from Luc Devroye.
Contributed by Elizabeth Goodspeed
Photo(s) by Bart Solenthaler on Flickr.
Contributed by Stephen Coles
Contributed by Florian Hardwig
Contributed by Nick Sherman