DATE: Probably saec. xii; saec. xii 2/2 suggested (Haapanen 1924); probably saec. xii 2/2, xii/xiii also suggested (Niskanen 2010). LITURGICAL USE: Diocese of Maastricht suggested (Haapanen 1924). ORIGIN: Probably not England or Trier; ecclesiastical province of Cologne suggested (Haapanen 1924); probably Germany or German influence (Niskanen 2010). OTHER NOTES: Previous references: M 4 (Haapanen 1924).