The Stanley Gibbons Group plc is a company quoted on the London Stock Exchange specialising in the retailing of collectable postage stamps and similar products. The group is incorporated in London. The company is a major stamp dealer and philatelic publisher. The company's philatelic subsidiary, Stanley Gibbons Limited, has a royal warrant of appointment from Queen Elizabeth II. The company has a long corporate history, having started as a sole trader business owned by Edward Stanley Gibbons in 1856 and now being a quoted company with a number of subsidiaries. The first Stanley Gibbons stamp catalogue was a penny price list issued in November 1865 and reissued at monthly intervals for the next 14 years. The company produces numerous catalogues covering different countries, regions and specialisms; many of them are reissued annually. The catalogues list all known adhesive postage stamp issues and include prices for used and unused stamps.