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Joannes Jacobus Mayenfisch Nob. Kaisserstuolensis Helvetius Phil. et Med. Doctor. en Portrait of Joannes Jacobus Mayenfisch ca engraved by Giuseppe Maria Abbiati Signed Joseph Abbiati Delineavit et Sculpt Photograph of original print Giuseppe Maria Abbiati other versions PDold Uploaded with Engraved portraits of men at half