| NL-M, Arch. OLV 1977 |
Antiphoner winter part; Onze-Lieve-Vrouwekerk in Maastricht; 15th century (similar to NL-M OLV 1978 and older than the graduale NL-M OLV 1970). Square notation on red staves.
Primum querite ...
Venitorium
1r: Dom. 1 Adventus
150r: Sanctorale (Andreas ? Rubric: In natali plur. apost.)