Siglum: 
D-Mbs 23001
Description: 

folio ms 38.5x55 cm Hufn on 4 red lines estimate ca. 1450 or even laterBoth ms and sequentiary begin with Trinity, then move to Christmas mass, probably a book for a secular church, few ferial feasts, but could just be a large choir bookFrom Augsburg? (written in pencil inside front cover)