Tweede Boerhaavestraat 61 I, Amsterdam Previous house Next house Residents in March 1940 Isaac Klein 1902 - 1943 Bertha Klein-Oppenheimer 1902 - 1943 Lea Klein 1940 - 1943 Hanna Regina Klein 1939 - 1943 Gidel Oppenheimer-Spier 1861 - 1943 Marcus Oppenheimer 1861 - 1940