The five-petalled rose, so dominant among the stamps on this binding, is not to be found in Kyriss or in Schwenke-Schunke. I found it first among the stamps attributed by the Einbanddatenbank (EBDB) to Asbach (w002785). However, none of the stamps on this binding other than this rosette are listed in EBDB for the Asbach workshop. So it seemed a deadend. However, this same rose surfaces among the stamps attributed by EBDB to a workshop “Michael” (w003402). Not only is this the same rose (rosette), but it is the SAME RUBBING! of this rose stamp. (Compare in EBDB rosette s021170 with s027162.) The other stamps on the Huntington Missale are listed in EBDB as belonging to this workshop ”Michael”. So what is going on here?
  One of the stamps shown in EBDB for workshop Michael (w003402) is a small schriftband engraved with the name “Michael”, and it appears that a binding shop has been named after the presumed holder of this stamp. The existence of such a bindery might, however, be called into question.
  Asbach was a Benedictine monastery in the diocese of Passau, and was located on the Rott River not far to the southwest of that city. It certainly makes sense that a missal for the use of Passau would find its way to this monastery and for such a text to be bound there. Many books from the Asbach monastery went to the Bayerische Staatsbibliothek in Munich at the time of the secularization in the early 19th century, and a number of these are identified as being "bound at Asbach." There are among these copies several that are inscribed by someone named Michael Auer. This same Michael Auer appears in the provenance of other Munich copies, and he apparently supplied the handwritten glosses in many of these books. Virtually all the copies associated with Michael Auer have Asbach provenance as well.
  A closer examination of all these Munich copies might help shed some light on this puzzle. In the meantime, it seems possible there may not have been a workshop “Michael”, and that the small scriftband bearing that name is an ownership or association stamp in the finishing kit of the Asbach bindery, and was perhaps used in the decoration of some bindings connected with Michael Auer. Should all this be the case, the stamps listed by EBDB for workshop “Michael” should be reassigned to Asbach, and the Huntington Missale Pataviense included among the books bound in that Benedictine monastery.