Interesting Czech Coin Museum Website

I stumbled on this website the other day and found it to be interesting. The website had a huge 10,000+ coin collection indexed and imaged. You can search by province, ruler, etc. The only part that troubles me is the collectors mark in dark ink on almost EVERY coin. As a US collector I just can't get past that practice. http://coins.azz.cz/index.php?lng=2/

From the website:
Welcome to web site of numismatic collection of the state chateau - Archbishop chateau and gardens in Kromeriz. The numismatic collection of the Archbishop chateau in Kromeriz was created especially in the second half of the 19th century, mostly as reminiscence of the former mintage activity of the Olomouc bishops and archbishops (the only ecclesiastical exponent with the right to mint coins on today's territory of the Czech Republic).
Ecclesiastical - religious coinages were mostly collected (see the offer structure). Coinage completeness of Olomouc bishops and archbishops was mainly emphasised, as for the other issuers - complex outline of coin types, especially of higher premiums. The collection was created without any respect to the amount of expended financial funds. The oldest part of the collection, ca 1/3, originates from unknown purchase sources or legacy (it is dealt with a huge part of unique and in literature not mentioned coins). The collection is an extraordinary and, up till now, preserved evidence of collecting activity in the second half of the 19th century. Acquisition activity for this collection was finished at the beginning of the 20th century.

A coupe of tough paderborn issues that show the collectors mark quite clearly: