Photo from the Chesterfield Museum Facebook page.

The item was brought into Chesterfield Museum this week.

A staff member said: "To be frank - we are at a loss.

"Is it some kind of lighting device? A soldering iron perhaps?

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Staff say they are 'at a loss' as to what the item could be. Photo from the Chesterfield Museum Facebook page.

"If you have any idea what this mysterious object could be, please get in touch."