This antique mail box is from an apartment building which would have a bank of these units for the tenants. This piece is made of brass plated steel and the door bell button is made of celluloid, one of the first plastics invented.
In good condition with no major damage, there are of course small chips in the plating, a bit of rust inside the box, and some discolouration of the brass finish as pictured. See photos for measurements or ask if you need specific measurements.
Comes with two keys as pictured