WWI Canon de 194mm GPF self-propelled gun.
https://diqn32j8nouaz.cloudfront.net...e_fullsize.jpg
Previously:
https://www.homemadetools.net/forum/...056#post176193
https://www.homemadetools.net/forum/...961#post152977
https://www.homemadetools.net/forum/...519#post177902
https://www.homemadetools.net/forum/...614#post193413
https://www.homemadetools.net/forum/...542#post193181
