One of the library broadsides incunabula bears a stamp from an unidentified library in Augsburg.
Thanks to the comments by Dr Klaus Graf and Verena Godde, my tentative reading of the stamp inscription “<Bibliothe>k des Kathol. Studie<rn****> in Augsburg” has been corrected in “Bibliothek des Katholischen Studienfonds in Augsburg”.
The stamp is found in the lower margin of the broadside edition of the Zeichen der falschen Gulden attributed to the workshop of Anton Sorg in Augsburg around 1482 [ISTC iz00019000; Oates (MS. addition) 921.5], now Inc.Broadsides.2. The text is a warning against false coins coming from the Netherlands and it is illustrated with ten woodcut images of the coins to help with their identification.
The stamp proves that the sheet remained in Augsburg at least until the 19th century. It was acquired by the library from Erasmus Antiquariaat, Amsterdam (Cat. 213A / 15193) in October 1958.