7817 - Crane Wagon
In 1985, Lego introduced a third wave of new Train sets, overhauling the starter sets. They also released two auxilary sets, one of which was this 7817.
1985 saw the release of this new crane wagon, which succeeds 7814. It looks more modern than 7814, and the new crane cabin keeps the operator dry. But from a technical point of view, it is less sophisticated. There is only one winch, and the angle of the crane arm is locked by a hinge plate construction. The model has support stands, useful when lifting heavy goods. It looks good and works fine, but it lacks the rough charm of 7814.
The B-model represents an aerial work platform wagon.