An unusual group of gold jewellery was discovered by a metal detectorist near Winchester in southern England in 2000. The hoard included two possibly unique massive necklaces made in a clearly classical style, but different from typical classical necklaces and from the torcs and collars of Iron Age Europe. The hoard also contained extremely rare gold versions of types of brooches commonly made in bronze and iron in north-west Europe during the first century BC, the end of the pre-Roman Iron Age. This paper describes these unique objects and the results of an archaeological investigation of their find spot. Detailed scientific analysis of the objects’ technology has proven crucial for interpreting their origins and broader significance. Finally, the broader consequences of the find for interpreting the significant changes that took place in southern Britain in the century before the Roman conquest are discussed.