Edison Photo 16 x 20

This photo is 16 x 20. The 3rd pic is of the back panel of the frame.
I have never taken the back panel off the frame. [Could be hidden treasures or documentation?]
The frame has signs on gold 'colored' paint.
It belonged to my Grandfather. He was an electrician & he wired the local theater for sound, back when the "talkies" arrived. He also served in the US Navy during WWI. He passed in the late 1960's. I've had this photo since the mid 1970's.

My questions:
Age/Year taken ?
Photographer ?
Value ?

Thank you.

Dave