most famous stamp in the world
The $400 stamp in the sheet features the stamp-on-stamp design. Guyanaâs Kaieteur Falls, one of the worldâs most spectacular and powerful waterfalls, is shown in the selvage. An inscription in the selvage reads: âOne Cent Black on Magenta. The year 2006 marks the 150th anniversary of the printing of the rarest and most valuable stamp in the world, the âOne Cent Black On Magenta.â