This maybe should have gone to the Military Forum but just to get it going. A Swiss WW that has some Radium? Burn in the old crystal. It is in a Swiss Sterling Silver case. It does run but I have no idea if it is unusual, rare, or junk.

Back of case

Movement and markings

I would not call this one junk in silver case
looks good Mike.

Mike

A nice early wristwatch from the late 20's. Made by Avia Watch Co (Chaux de Fonds, since 1910) intented to the anglo-american customer. The swiss silver export mark (standing bear) was used pre 33.
As Peter said monometallic cases of all kind are fine to refinish. Cleaning, relume and a new strap would make a fine watch.

Please tell the diameter of the movement.

Regards
Gerald

Gerald, thanks for the info. It is 29 mm in diameter and it does run but of course it needs oiling at the minimum.

I think the initials are for the Central Labor Council, Helena Montana...an affiliate of the AFL/CIO

Thanks Ray, that does make sense.

Be careful of the radium paint. The zinc sulfide is fully burned, but the radium in it is still almost as powerful as the day it was made. The half-life of radium is 1,600 years.

Thanks Jim. That's even older than Phil Sanchez! Warning heeded.

Mike, For your information Radium and I are closely related.

Sorry Phil, I had NO IDEA you read this WW Forum

Mike it's a hard job but some one has to do it.

Since I try to write english it's even harder

Gerald