Hey I've searched and searched for that style of Neume and guess what Here she is.
CANTORINUS: READINGS FOR THE OFFICE OF THE DEAD, TAKEN FROM JOB 7, 10, 14, AND 19
MS in Latin on vellum, Norway (or Denmark?), 15th c., 1 f., 21x14 cm, single column, (19x14 cm), 8 lines in Norwegian cursive book script, + 8 lines of "Tête de marteau" notation on a 4-line staff, of a Scandinavian type, with C-clef indicated.
Provenance: 1. Sotheby's 19.6.1990:3.
Commentary: The Cantorinus is a very rare liturgical book. It was formed in the 14th or 15th c. after the Tonary. It is the booklet containing the musical (not liturgical) classifications of the Gregorian antiphons and responsories with addition of the soloists' songs. In "Tête de Marteau" notation the notes are shaped like hammer heads.
http://www.schoyencollection.com/music.htm#7.2