Jewish forced labor was common during World War II. Most of this took place in concentration camps or ghettos, however, some Jews worked in factories. This collection contains the names, birth places and dates, and even some pictures of about 500 Jews who were forced to work at a metal fabrication and electronics firm in Berlin called, Ehrich & Graetz, between the years of 1941-1943. Those who didn't emigrate or go into hiding were eventually deported to concentration camps. These records are from the book Jüdische Zwangsarbeiter bei Ehrich & Graetz, Berlin-Treptow.
You can learn more about this database at the JewishGen website.