A vector tracing of the signature of German-born Estonian painter Karl August Senff from a copper-plate engraving published in Neumann, Wilhelm (1895). Karl August Senff: ein baltischer Kupferstecher. Reval: F. Kluge.
https://books.google.com/books?id=N8pIAQAAIAAJ&amp;pg=PP6&amp;dq=karl+august+senff&amp;source=gbs_selected_pages&amp;cad=3#v=onepage&amp;q&amp;f=true
Karl August Senff