BLACK PENNY ON STAMPS
Isle of Man stamps - 150th Anniversary of the Publishment of the First Stamp, Date of issue 3rd May 1990
Sri Lanka stamps - World Post Day - 175th Anniversary of the World's First Postage Stamps, Penny Black, Date of issue 10th October 2015
Tuvalu stamps - 150th Anniversary of the Penny Black, and International Stamp Exhibition "Stamp World London 90" - London, England, Date of issue 3rd May 1990
