Can someone tell me what this is used for. It's brass, measures 1 1/2 in long and marked Illinois on one of the legs and watches on another.

Thank you,

Ray

It's a tool for letting down the mainspring. Slip it on your finger and release the click while easing the mainspring with the crown.

Totally worthless, you should send it to me

Bob

Thanks Bob for the info..I would send it to you but then what would I use to let down my mainsprings?

Ray

That's the first time I've seen that tool, very neat. I have a thimble, that someone brazed a common pin on the end, works great.
Brian C.