The Perkins Bacon Archive
The Perkins Bacon printing company can trace its British origins back to 1819 as it attempted to win a contract to produce unforgeable notes.
Despite failing to obtain this contract, Perkins Bacon went on to pioneer new security and philatelic printing techniques. They were awarded the contract to print the first Penny Black and printed numerous stamps for territories around the world.
The firm went bust in 1935, after which the company's records were purchased by the Royal Philatelic Society London.
The archive includes Perkins Bacon’s engraving and hardening books, delivery books and extensive ledgers, printing records and correspondence. Percy de Worms has published aspects of the records, yet there is still much in the archive for researchers, especially if you're interested in early line-engraved issues.