Signature: In pen and brown ink at bottom of roundel: Ant. Crussens F. Inve.
Inscription: Verso, upper center, in pen and dark violet ink: Ant. Crussens. I. Inve.
Verso, center, in graphite: 6164
Verso, lower right, in graphite: 1975.131.175
Marking: Lower right: collector's mark of Ferdinand Wecbrodt (Lugt 2588)
Verso, lower left: collector's mark of Ed. Schulze (Lugt 906)
Verso, lower right: MMA stamp