Samuel Dingsdag joined the Hollandia-Kattenburg textile factory in Amsterdam on 4 February 1935. On Wednesday, 11 November 1942, around 4:30 PM, Willy Lages conducted the Sicherheitspolizei raid on the Hollandia factories. All exits were blocked, and the Jewish staff members were taken away that evening. Photographs of all workers taken away that evening, as well as those deported previously, appe…