Host volume: copies of the Ambrosiaster (commentaries by a Pseudo-Ambrosius on the letters of the apostle Paul), produced in the second half of the 9th century at the Abbey of St. Gall.
The clasp contains a fragment as well.(Sandy Maillard, Fragmentarium, 2018, incorporating material produced by Dr. Karl Schmuki, Stiftsbibliothek St. Gallen for e-codices.)
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St. Gallen, Stiftsbibliothek St. Gallen, Cod. Sang. 330, Digital Colorchecker – Missal — https://fragmentarium.ms/view/page/F-fkw2/1468/19086