Tom Scott Antiques has dated this piece to the 1880s.
Flanked by fluted columns and a full plinth base which is often a plain rail for a typical overmantle mirror, which suggests this mirror is intended as a console table mirror for example.

Good original gilding and it has aged gracefully, giving a lovely warm tone. All cleaned and buffed, ready to hang.
Top right corner of the glass you can see some very small foxing spots.
Great size and proportion mirror, dimensions below for you:
63 1/2” or 163cm high
33 1/2” or 85cm wide
Tom Scott Antiques has dated this piece to the 1880s.
Specialist dealer in french & english decorative furniture and interiors
You can view the stock and full dealer information on the Tom Scott Antiques Profile Page