The front and back covers are fragments of parchment folios from a 14th-century carminis for Latin grammar and prosody.
Bibliography:
Tabulae codicum manu scriptorum, v. 3 (Wien, 1864-1899); catalog online at: Manuscripta Mediaevalia
Notes:
Jenni-Theisen. Mitteleuropäische Schulen III (2004): 48; Tegumentis ambobus adglutinata sunt fragmenta membranacea carminis de grammatica et prosodia latinis, saec. 14