A similar style derrick was used on the 3 ton Signal Construction truck which used a body "similar to AT&T telephone line truck". As a result, there may be more derrick sets available than CMP production alone would have created. Although the images suggest that the derrick heads looked similar I have no idea whether the same parts were used in both derrick sets for economy or if the Engineers and Signals people would have insisted on their own designs. The Body Parts book only refers to the Engineer variant.
If the Signals and commercial telephone bodies used similar derricks to the Engineer body, it is possible that the winches might all have been similar too..... not chassis mounted but higher in the body with a capstan drum as well as the cable drum (although the Signals version also had a cable reel driven from the winch), all operated from within the body as opposed to the cab controls for the chassis mounted winches.
There is a photo in Canada's Fighting Vehicles that shows the derrick poles stored in a compartment along the left side of the Signals body.
What is the maximum size image I can attach, to share the images from the Body Parts book? I would like to keep good detail but not waste bandwidth, you know the story.
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