Newcomb Gold Gilding Warrantied Frame?

I am interested in the value of the Frame/Case -- not in the pocket watches that are

displayed.

On the back of the frame is a label that says the gold gilding has been warranted by

Newcomb.   I think Newcomb/Macklin were a famous frame company in the midwest

in the 1940's?

The frame/case measures 17 1/2" high x 13 1/4" wide x 4" deep

The inside shadow box is 11" high x 9" wide x 3" deep

My grandfather's hobby was carpentry and so I am wondering whether he

 took an existing Newcomb frame and added the watch case-shadow box

 and therefore what the value of the case/frame might be.

Thanks so much for your help and information.