Excelsior Paris Opera glasses / binoculars w/ 2 zooms levels

Found these binoculars in the attic of an 1800s house.  They are in excellent condition and have the words Excelsior Paris on the right eyepiece. Glass is vert clear and seem tobe made of a brass material with mother of pearl inserts.

I would like toknow how old, where from and value for these.

Thanks so much for any help.

Chris