Parchment, iv modern parchment flyleaves + 309 fols. (foliated I-XIII, 1-296) + iv modern parchment flyleaves, 190 x 140 mm (125 x 95 mm), 18 long lines, ruled in plummet, quire and leaf signatures in quires 18-27, catchwords, fols. 292-296 added in the 14th century were previously bound at the beginning of the volume, two leaves missing after fol. 64, two more missing before fol. 227, one leaf missing before fol. 242 and another one after fol. 291.
The Calendar text is written in gold and blue, the main text in iron-gall ink and its rubrics in vermilion red.
