Penny Lilac as perfins - that is with initials or insignia added as perforations to mint stamps which meant they could not be redeemed for cash at a post office. The addition of perfins was widespread practice in Britain from the 1860s as a precaution against theft. Penny Lilac The Penny Lilac was the basic penny postage stamp of Great Britain from its first issue on 12 July 1881 and was used until 1901. It superseded the short lived Penny Venetian Red because the Customs and Inland Revenue Act of 1881 necessitated new stamps that were also valid as revenue stamps, and
Penny Black of new red stamps, but a small number were printed in black. These are scarce. The stamps were printed in unperforated sheets, to be carefully cut with scissors for sale and use. As a result, stamps with badly cut margins, or no margins, are common and worth very little, while examples with four clear margins are rare and valuable, and fetch very high prices, especially if in mint condition. An original printing press for the Penny Black, the "D" cylinder press invented by Jacob Perkins and patented in 1819, is on display at the British Library in London. The total