One of several fragments from an antiphoner likely from the Abbey of Mondsee.
Staffless neumes.
https://fragmentarium.ms/view/page/F-q4re/703/10890
Folio 2 forms the lower half of the first folio of a different fragment, (http://cantus.uwaterloo.ca/source/701224 ); folio 3 is the right-hand segment of the second folio of the same fragment.