Ad for Rudolf Keel’s Confiserie Moderne, a confectionery in Zurich, Switzerland. The address mentions the Zett-Haus, or Z-Haus, an important local example for Neues Bauen, built in 1930–1932. It was also home to the Roxy cinema, renamed in the 1970s to Ritz and since 1993 known as Kino Metropol.
The typography uses several sizes and weights of Erbar, which can easily be told apart from other early geometric sans serifs by its descending eszett (see “Badenerstraße”).
In Switzerland, ß has been gradually abolished since the 1930s, when most cantons decided not to teach it any more, and the Swiss postal service stopped using it in place names. The Neue Zürcher Zeitung was the last Swiss newspaper to give up ß, in 1974. —Wikipedia
The “ff.” stands for finissimo, i.e. superfine quality. Note the constructivist illustration which apparently was composed from various lines and geometric dingbat sorts.