Artefacts worth £53,000 have been stolen in Derby.
Medals, coins and watches were taken from the Derby Museum and Art Gallery storage facility between May 2 and June 19 2012.
Amongst the haul is a collection of 18th and 19th century gold and silver watches worth up to £3000 each.
The items were kept locked away only being used for exhibitions and special viewings.
The thefts came to light when the museum service was contacted by another museum with a request to borrow some of the items for their own displays.
Anyone with information about the whereabouts of the stolen items or the perpetrators of this crime is asked to contact Derbyshire police.