Police believe a rare 470-year-old coin may prove the key to snaring the savages who fatally injured a pensioner in his own home.

The reward for information leading to Arthur Gumbley's killers has been cranked up from £10,000 to £40,000.

Detectives believe items taken during the break-in may prove vital in cracking the case.

And the most distinctive of those is a Henry VIII Angel cold coin, forged between 1544 and 1547.

Arthur, a keen metal detectorist, uncovered the treasure while combing a field. Also taken was a House of Parliament pot and a unique gun-shaped knife.

Eight inches in length, one side is designed as a bayonette, the other a pistol with wooden handle.

Someone has possession of those distinctive items.

Arthur's daughter Sue Boys said: "We hope the coin will prove important because it is so different.

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How rare coin could hold vital clue to murder of Arthur Gumbley(https://www.birminghammail.co.uk/news/midlands-news/how-rare-coin-could-hold-14846786)