Don't collect slabbed pieces myself, but that is interesting - the term "petermentger" was first used just colloquially for such an albus coin. The term refers to St. Peter who is depicted on the pieces. In the late 17th century this 3 albus coin became quite popular in various German countries, and the colloquial name was used on the pieces, sometimes even without the depiction of the saint. Trier, by the way, does not just refer to the city but to the much bigger territory ruled by the archbishop of Trier. He also had the position of a prince-elector, i.e. was one of the seven rulers who elected the German emperor - hence the "Churtrier" on the coin. Christian
