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