italian used postage stamp from the imperial series with effigy of julius caesar

rome circa 1929 italian used postage stamp imperial series effigy julius caesar commemorative philately collector edition design engraving printing postal history landmark official memorabilia artwork heritage empire ruler ancient historical emblem cancellation perforation adhesive mint face value currency envelope postmark mailing classic portrait legacy governance philatelic roman figure engraved issue condition mark rare 039 item collection vintage classical imagery emperor numismatic