Basically a sheet metal box and stoutly made, the Mobile Crane had a long boom extended forward with a pulley wheel at the end. The usual wind-up handle and axle, and the whole box, was pivoted to a base mounted on the Crawler suspension. This suspension was, however, upside down, presumably because it was easier to attach that way! The two we have seen were red cabs with yellow under carriage, but most importantly, a Tiger Toy transfer clearly placed on the side!