The world's first adhesive postage stamp, the Penny Black (issued 1 May 1840, Britain)
The 1-penny black Swan stamp was issued in 1854.
Communications 25p Stamp (1995) Hill and Penny Black
On this day 1st May, 1840 The first British Penny Black stamp went on sale. Invented by Rowland Hill, it was the world's first adhesive postage stamp and it became valid for postage on 5th May
Penny Black - British postage stamp
Many people do not realise that Ireland issued the world's first postage stamp. As part of the United Kingdom of Great Britain & Ireland, the famous penny black stamp was issued in Ireland as well as test of the Kingdom.