Brewster F2A-1 fighter of Fighting Squadron Three (VF-3) At Naval Air Station, North Island, California, 9 September 1940.
The plane is painted in McClelland Barclay experimental camouflage design Number 2. Note gun-camera mounted on the starboard side of the fuselage, forward. Grumman F2F-1 fighters of Fighting Squadron Two (VF-2) are in the background.
Design number 1 is in the below, NH 96143
Of course the U.S. Navy and Marines had legit issue with the Brewster F2A Buffalo, dubbing it “the flying coffin” when flying against highly trained Japanese pilots with arguably better aircraft but the Finns, who used 44 Model B-239 (export) F2As nicknamed Pylly-Valtteri (“Butt-Walter”) and Lentävä kaljapullo (“flying beer-bottle”) among others, made mincemeat out of Red Air Force planes for a time.