Armored Bank Van With Tail Gunner, 1936

It’s a Wellington Everett (Ev) Miller design built on a 1936 Mack chassis by Advance Auto Body Works in Los Angeles in their second factory located at 1000 Macy Street, Los Angeles (at the corner of N. Mission Rd. and E. Macy St. - now N. Mission Rd. and Cesar E. Chavez Ave.).

Advance built other Miller designs such as the Gilmore tankers (including the neon one) and the Arrowhead Spring Water tear-drop car. They got out of the business in 1951.

(via Just A Car Guy)