Tom Scott Antiques has dated this piece to the 1930s.

The mirror can be hung “landscape” as you see it here, or “portrait.”
Measuring:
Frame size
48 inches or 122 cm high
60 inches or 152.5 cm white
Mirror glass
35 1/2 inches or 90 cm high
47 1/4 inches or 120 cm wide
Tom Scott Antiques has dated this piece to the 1930s.
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