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Here's a shot of the ongoing development of the HO scale model six axle truck crane. It is shown with 220 scale feet on boom, the maximum.

Here’s some shots of the work in progress on the Manitowoc 3900 T truck crane. I have admired this machine since it first came out in 1963, fine Manitowoc engineering and design and the first six axle carrier although Hendrickson was building one for American Hoist at the same time they were building Manitowoc’s.