The “Zürcher Hochschule Winterthur” existed as University of Applied Sciences only from 1998 until 2007, when it was merged with three other institutions into the “Zürcher Hochschule für Angewandete Wissenschaften”, i.e. the combined University of Applied Sciences of the swiss canton of Zürich. This canton includes more cities and villiages than the city of Zurich alone, first of all the city of Winterthur. To this day, the “new” university has a big campus in Winterthur. This stamp stems form the time of the sole university in Wintherthur.
The style of the stamp is noticeable. The big circle, with the uneven logo / abbrevation of the university, and the full name at the egde of the circle, squeezed their by the logo, is still the style used by the library stamp of the current University of Apllied Sciences.