William Maving Gardner (25 May 1914 in Newcastle – 28 December 2000) was an English coin designer, engraver, calligrapher and writer who worked regularly for the Royal Mint over a 30-year period. He is notable for designing coins such as the British 20 Pence Coin and some of the coins of Cyprus, New Zealand, Jordan, Guyana, Dominican Republic, Sri Lanka and the Falkland Islands.
After having studied calligraphy and letter design at the Hampstead Garden Suburb Institute in his teens, Gardner enrolled at The Royal College of Art, simultaneously studying (in his second and third years), at the Central School of Arts and Crafts under George Friend, J. H. Mason, Barry Hart and Martin Travers. In 1939 his studies were finally rewarded with a diploma and The Travelling Scholarship from the Royal College of Art.
Gardner was most well known for his designs for the reverses of the 1953 three penny piece, English and Scottish shillings and the decimal 20p reverse of 1982 still in use today. The artist engraved the coins himself.
He also designed the British Privy Council Seal, the HM Greater and Lesser Signets as well as the seals of the British Medical Association and the Royal Society of Arts.
With the outbreak of World War II, Gardner was soon posted to the Army Camouflage Development and Training Centre at Farnham, where he became involved in the training of 7,000 men of all ranks. Before D-Day he was regularly in the air to advise on camouflaging the build-up of forces. In November 1944 together with a colleague, he set up and ran a new camouflage training school at Scottish Command, Edinburgh.