It does stretch a small bit to fit. Silver sides are 1 1/8" long by 1/2" wide at the widest part and it gets narrower to 1/4 wide at the other end. The silver end that goes in the watch loop is 1/2" wide and the opening on the other end that is connected to the metal flexible band part is little over 1/8" wide. Silver sides with the stone inlays are marked on the inside MYP STERLING on one side and ZUNI N. MEX on the other side.
Will need a new battery. Awesome jewelry piece that will be a rare and highly collectible addition to your silver jewelry.
In old watches like this, I have seen people remove the watch movement and put a photo underneath the watch Crystal. I think that is lovely! Please review photos as they are part of the description.