10622/LIUQQQ Schorsij, Micon(IISH)Daniël Metz(Beltsazar) IISH Data Collection 2019 Inventarisation of diamond factories in Amsterdam between 1840 - 1940. Based on original list compiled by Daniel Metz, checked and expanded by Micon Schorsij. Main sources are the Nijverheidsstatistiek Struve en Bekaar for North Holland, Delpher newspapers and magazines and various websites (see the inventarisation). International Institute of Social History