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Penny Black Anniversary Machins (page updated: Dec 28/03) Five anniversary Machins (double-headed) were issued Jan 10/90 to celebrate the 150th anniversary of the first postage stamp, The Penny Black, issued by Great Britain in 1840. A non-value 1st 'Penny Black' design was released in 2000 for the 160th anniversary. Issue dates shown reflect the first release of that value. See the specialized lists for additional varieties. (jump to denomination/colour illustrations)   15p light blue (Jan 10/90) 20p black (Jan 10/90) 29p purple (Jan 10/90) 34p slate blue (Jan 10/90) 37p red (Jan 10/90) 1st black (Feb 15/00) Denomination/colour illustrations: