Barend Doof lived with his family in 1921 on the Waterlooplein 62 III. At that time he was an unemployed diamond worker. Schoontje Sealtiel was a tailoress. She had worked for Mutter and Co on the Nieuwe Herengracht.
Stadsarchief Amsterdam, Archief van de gemeentelijke sociale dienst, inv. nr. 1163 dossier 5001
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