Every item of data recorded (a certain style of decoration or binding, the date of a manuscript note, etc.) is treated as a valuable clue for provenance, therefore it can be geographically located and chronologically dated. This enables to track the movement of books across Europe and through the centuries.
mei/02101247 KW 171 A 35 [4]
[02101247]
Den Haag, Koninklijke Bibliotheek - Nationale Bibliotheek van Nederland (NL)
: KW 171 A 35 [4]