Mark TOBEY
1890–1976, USA/Switzerland
1961
Signature considered genuine
1964
Signature considered genuine
Ca. 1965
Signature considered genuine
1966
Signature considered genuine
1967
Signature considered genuine
1968
Signature considered genuine
1970
Signature considered genuine
1971
Signature considered genuine
1972
Signature considered genuine
1973
Signature considered genuine
Signature considered genuine
Signature considered genuine