Corrie Ten Boom trained under her father as a watchmaker, and in 1922 she became the first female licensed as a watchmaker in Holland.
Corrie and Betsie opened their home to refugees — both Jews and others who were members of the resistance movement — being sought by the Gestapo and its Dutch counterpart. They had plenty of room, although wartime shortages meant that food was scarce. Every non-Jewish Dutch person had received a ration card, the requirement for obtaining weekly food coupons. Through her charitable work, Ten Boom knew many people in Haarlem and remembered a couple who had a disabled daughter. The father was a civil servant who by then was in charge of the local ration-card office. She went to his house one evening, and when he asked how many ration cards she needed, “I opened my mouth to say, ‘Five,'” Ten Boom wrote in The Hiding Place. “But the number that unexpectedly and astonishingly came out instead was: ‘One hundred.'” He gave them to her and she provided cards to every Jew she met.