This photo and caption appeared in the October 1953 issue of Popular Science (page 124). There are several interesting things in this photo. First, this jeep is setup with right-hand-drive; second, the body has been cut similar to the way some of the DJ-3As would be trimmed on the sides; third, this vehicle is only two-wheel-drive. This is the earliest photo that I know showing an experimental mail jeep that, arguably, led to the DJ-3A Dispatcher/Delivery/Convertible production models. The picture, without the caption, can also be found on the CJ-3B page about mail jeeps.