Black and white head portrait of German physician and traveler Philipp Franz von Siebold extracted from a 1996 Deutsche Bundespost stamp
Deutsche Post AG (undoubtedly based on an earlier work by another artist)
<a href="//commons.wikimedia.org/wiki/File:Ph._F._von_Siebold_(timbre_RFA).jpg" title="File:Ph. F. von Siebold (timbre RFA).jpg">Deutsche Bundespost stamp image (1996)</a>