The collection consists mainly of copy negatives, slides, and digital images of pre-World War II photographs of the families of Harry Blas, born in Łódź, Poland, and Erika Stockfleth Blas, born in Grevesmühlen, Germany. Also included is a short memoir by Harry Blas detailing his experiences in the Łódź ghetto and Auschwitz concentration camp, and a handwritten genealogy of the Stockfleth family by Erika Blas.