The item was part of a collection of manufacturers' stamps
Museum staff in south Somerset say they are baffled by an item that has been discovered among stock which was being sorted for possible display.
They believe the three-pronged wooden and metal item may have some connection with Yeovil's past gloving trade.
A spokesman said the item was causing "growing curiosity" among staff.
"On initial inspection, we think it could be some sort of stamp used to mark gloves, but this is speculation," the museum spokesman added.
The item was found at the Community Heritage Access Centre, which sorts and catalogues potential exhibits.
Volunteer Jean Harper, who has worked with gloving artefacts for 15 years, said: "I have never seen anything like it before.
"I was intrigued when the stamp turned up in an interesting collection of manufacturers' stamps that I had been asked to sort through which is why we think there is a gloving connection, but we want to know more.
"It could be around 100 years old," she added.