The collection consists of c. 1,200 Iron Age coins. It is particularly strong for Britain, thanks to the Arthur Evans collection with its numerous gold coins, and for Gaul thanks to the collection formed by Derek Allen, which is particularly strong in bronze. The collection is of significance for the development of the subject. Sir John Evans, some of whose coins are preserved in the collection of his son Arthur, was a pioneering figure in the field of prehistoric numismatics and was the first person to devise a systematic classification of British Iron Age coinage. Derek Allen was likewise a key figure in the study of Celtic numismatics.