I made a start on this, but the initial burst of enthusiasm faded when it became clear that patterns were unlikely to emerge, and the table has languished until now. Over the past few days, however, I have brought my table to a more complete state, and share it now as a Google Doc in case it is of use to anyone. It is arranged like this:
|[Click to enlarge]|
I hope that people will find this table when they encounter a manuscript with a typical "Ex libris A. Brölemann" bookplate and Google it, and that they will send me additional identifications, current locations, or additional provenance.