WWI trench-digging machine.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...e_fullsize.jpg
https://s3-us-west-1.amazonaws.com/h...ng_machine.jpg
Previously:
https://www.homemadetools.net/forum/...993#post100437
https://www.homemadetools.net/forum/...491#post122730
https://www.homemadetools.net/forum/...017#post120191
https://www.homemadetools.net/forum/...4804#post80611
https://www.homemadetools.net/forum/...2016#post75586
