Alfred Hermann HELBERGER
1871–1946, Germany
Also known as: AH, Alfred Hellberger
1911
Signature considered genuine
1913
Signature considered genuine
1914
Signature considered genuine
1914
Signature considered genuine
1916
Signature considered genuine
Signature considered genuine
Signature considered genuine
Signature considered genuine
Signature considered genuine
Signature considered genuine
Signature considered genuine
Signature considered genuine
Signature considered genuine