The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Penny Black William Wyon RA. Fulmar Colour Printing. National Postal Museum
Penny Black. William Wyon. Clive Abbot. National Postal Museum. Fulmar Colour Printing
Postage One Penny. The Penny Black. was Engraved by Frederick Heath. British Museum
1840 First Engraved Issue. The One Penny Black Adhesive Stamp. Cameo StampsLondon. The Foster Press City of London
London. National Postal Musuem. The Penny Black. Worlds first adhesive postage stamp 1840. Fulmar Colour Printing 1990. Mitcham. Factory Stamp 1991
The Penny Black. The World First Adhesive Stamp Issued. National Postal Museum. Post Office Collection
National Postal Museum. Post Office Collection. The Penny Black
William Wyon RA. Chief Engraver Royal Mint. National Postal Museum
