WWI prototype steam tank America, c. 1918.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...k_fullsize.jpg
https://s3-us-west-1.amazonaws.com/h...erica_tank.jpg
Previously:
https://www.homemadetools.net/forum/...722#post174774
https://www.homemadetools.net/forum/...999#post164509
https://www.homemadetools.net/forum/...293#post165700
https://www.homemadetools.net/forum/...309#post158002
https://www.homemadetools.net/forum/...064#post160729
https://www.homemadetools.net/forum/...072#post164818