Foreign delegates. Place of persons indicated on the back.
Group portrait P Voogd, Max Westphal, G Vanderveken ...
Group portrait P Voogd, Max Westphal ...
In the building of the "Maatschappij voor den werkenden stand". Place of persons on the back.
In the meeting-room of the Czech Social-democratic Party. Place of persons on the back.
Group portrait H.c Hansen, Max Westphal ...
Meeting in the building of the railway mens' union. Place of the persons on the back.
Group portrait Koos Vorrink, Karl Heinz ...
On the day of the meeting of the bureau. Place of persons on the back.
Meeting of the Executive Committee. Place of the persons named on the back.
In the "Meenthuis". Place of persons on the back.