Willy and Edith in both the Breslau synagogue community address list (ca 1930) and the 1939 census of Breslau at Opitzstrasse 74. The Breslau synagogue community address list (ca 1930) gives his date of birth as 06/05/1895 while the 1939 census of Breslau gives 06/05/1898. The 1939 census also lists a Peter-Joachim Krebs born 15/12/1925, who I assume is their son.