Frans Crabbe began exploring printmaking after Albrecht Dürer's visit to the Netherlands in 1521.
Early artists did not sign their names or identify themselves as the maker of the work in any way.
At some point artists began adding discrete logos, monograms, initials, etc.
to their works but in a number of cases the actual artist has not been identified.
Friedlander positively identified the "Master of the Crayfish" as being Frans Crabbe in 1921.