The early Jeeps (like the Model T Fords) were marketed as having a variety of available add-ons, and this is one of the nicer ones. Dually, backhoe, plus blade.
https://s3-us-west-1.amazonaws.com/h...or_digger1.jpg
https://s3-us-west-1.amazonaws.com/h...or_digger2.jpg
https://www.youtube.com/watch?v=KFTlxrfu7FU
Previously: Autobiography of a Jeep