Identification needed please

[graduate_owner]

Hi all,
Can anyone tell me what this might be please? I am not even sure if it is a tool. It is all metal construction. The knurled handle moves one of the pointed studs towards / away from the direction of the handle, and the knurled wheel mover the other 2 point apart /closer. My hand gives an idea of size.

Many thanks,

K

 

[Amplidyne]

Watch back removal tool for screw off backs. I've got one.

ETA it's modern. You'll find them on eBay etc.

 

[Katomi woodsmith]

Watch back removing tool
I also have one in a kit

 

[graduate_owner]

Watch back removal tool for screw off backs. I've got one.

ETA it's modern. You'll find them on eBay etc.

 

[graduate_owner]

Thank you Amplidyne. That makes sense. I have had a look at a youtube video too. Easy when you know how.

K

 

[Cozzer]

At first glimpse I thought it was going to be a gadget for radiusing fretwire, but no.
As others have said, for watches.