A caps-only alphabet shown in Lettera 2, edited by Armin Haab and Walter Haettenschweiler, 1961, and credited to Roland Schenk, 1959.

At that time Schenk was art director for Swiss arts periodical Du, so perhaps this was a custom headline alphabet created for that use. It's unclear if it was ever produced as a phototype font, but Lettergraphics appears to have copied and extended it as California Caps.