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Although found more than half a century ago, it is only this year that the piece has been identified as an Iron Age gold torc (a form of high-status necklace) after it was submitted to the British Museum.

It is very similar to examples in the so-called Snettisham Hoard, also discovered in Norfolk, which is now in the museum.

Stylistically, torcs can vary in design, some being very elaborate, although this example, measuring 7½in (19.5cm), is relatively simple with plain loop terminals.

Although as a gold object more than 300 years old, the 'Diss' torc qualified as treasure under the 1996 Treasure Act, a review decided it did not qualify as treasure trove and it was released to the owner, then consigned to Spink for sale.

Offered with a pre-sale estimate of £25,000-35,000 on September 30, bidding came first via the internet and the phones then finally two contestants in the room, one of whom, a private collector, secured it.