This faux painted wall box measures 16" tall by 11 1/2" wide and 7 1/8" deep.
The construction is nailed and the wood is 1/2" thick pine. It is painted a medium brown over black. The 8 tine comb decoration is in a "ribbon" pattern exposing the black ground. Nicely done.
The wall box likely dates to the first half of the 20th Century.