Iron money chest with complicated lock of fifteen spring bolts, and iron pipe key with triangular protrusion in bow, 17th century

Iron door key from Craigmillar Castle, Edinburgh, 15th century

Belt hook key chain with detachable key ring, and eight iron cabinet keys of various types, found in Loch Leven, Kinross-shire, 16th century

One of a group of orders, medals and badges awarded to Sir Alexander Fleming, discoverer of penicillin, presentation key in gilt and enamel, 1948

One of a group of orders, medals and badges awarded to Sir Alexander Fleming, discoverer of penicillin, Alpha Omega Society, Oklahoma, gold key, 1954

Iron key pierced at the top, from Pierowall, Westray

Key token instrument, dating from c. 1955

Key-shaped bone finger ring: Ancient Egyptian, Middle Egypt, Oxyrhynchus, Roman Period, 30 BC - 395 AD

Small metal key, for tea-caddy box: possibly Europe, 19th century

Key for a 16th century French cabinet: English, 2nd half 17th century

Key of cast brass with twisted rope design on handle: West Africa, Nigeria, Edo State, Benin

Steel key for the nécessaire de voyage or travelling service assembled by Martin-Guillaume Biennais for Napoleon's sister, the Princess Pauline Borghese, possibly at the time of her marriage to Prince Camillo Borghese in 1803: French, Paris, c. 1803, bequeathed to Alexander, 10th Duke of Hamilton, in 1825

Small steel key for the nécessaire de voyage or travelling service assembled by Martin-Guillaume Biennais for Napoleon's sister, the Princess Pauline Borghese, possibly at the time of her marriage to Prince Camillo Borghese in 1803: French, Paris, c. 1803, bequeathed to Alexander, 10th Duke of Hamilton, in 1825

Small steel key for the nécessaire de voyage or travelling service assembled by Martin-Guillaume Biennais for Napoleon's sister, the Princess Pauline Borghese, possibly at the time of her marriage to Prince Camillo Borghese in 1803: French, Paris, c. 1803, bequeathed to Alexander, 10th Duke of Hamilton, in 1825

Steel key for screwing down the chest of the nécessaire de voyage or travelling service assembled by Martin-Guillaume Biennais for Napoleon's sister, the Princess Pauline Borghese, possibly at the time of her marriage to Prince Camillo Borghese in 1803: French, Paris, c. 1803, bequeathed to Alexander, 10th Duke of Hamilton, in 1825

Key from Threave Castle, Kirkcudbrightshire, 14th - 15th century