The stamp of the library of the ETH Zürich ( Swiss Federal Institute of Technology Zurich) tries to impress by using a swiss blazon. It seems a little bit overachieving.
In the same book, the stamp of the “Grüne Bibliothek” (Green Library) which is part of the library system of the ETHZ. The library is responsible for the subjets of environment, agricultural and food sciences. Looks more common then the other stamp.