BILDPOSTKARTE Bauer, Karl; Bauer, Klotilde Author: Bauer, Karl; Bauer, Klotilde Recipient: Haeckel, Ernst Dating: 15.02.1918
BILDPOSTKARTE Haeckel, Walther; Haeckel, Josefa Author: Haeckel, Walther; Haeckel, Josefa Recipient: Haeckel, Ernst Dating: 13.12.1916
BILDPOSTKARTE Haeckel, Walther Author: Haeckel, Walther Recipient: Haeckel, Elisabeth; Haeckel, Emma Dating: 31.07.1889