The 1840 Penny Black was the first official one of these
Plate 2... [DOC] [TLE] The World's First Postage Stamps - Postal Museum - Smithsonian [PAR] A letter carrying a Penny Black and deliberately sent on May 5, 1840, the day ... 
More than 70 first-day Penny Black covers are known, but only this one, the... [DOC] [TLE] The Penny Black, how to determine its value | The Stamp Echo [PAR] Nov 13, 2008 ... As most stamp collector already know the Penny Black is the world's first ... and 
was issued by the United Kingdom of Great Britain and Ireland on May 1st 1840.