Source: http://www.flickr.com. Claas Philipp Bischof. License: All Rights Reserved.
This is Mammut Werbeschrift schmalfett, a German commercial script typeface designed by A. Schulze and published in 1932 by L. Wagner. Here it is used on a pack of hundred “telephone lamps” by the company Taunuslicht, probably from the 1950s or 60s. Mammut Werbeschrift is less common than the similar Block-Signal by Berthold (1932), or Elan by Stempel (1936), and – to my knowledge – it has not been digitized yet. The hook on “u” is not an umlaut, but a means to distinguish “u” from “n”.
