Terrific find and I will be interested to hear what the experts have to say.
The part that I am able to read appears to say:
S ALBERTI… with a distinct space between the
S and the
A but the spacing thereafter is somewhat uncertain, as is the continuation of the letters… which look like
PPT
Note that the
E is in mediaeval gothic style, somewhat like this:
View attachment 1836759
I wonder if this might relate to Saint Albert the Great (Albert Magnus/Albert of Cologne), the prominent German Catholic Dominican Friar and Bishop of the 13th Century. Although he wasn’t formally canonised by the Catholic Church until 1931, he was certainly regarded with saintlihood by his followers long before that, and particularly after he was beatified in 1622. The Catholic Church now distinguishes him as one of the 36 Doctors of the Church