A Post-Apoc Tank That Never Was

Continuing with ideas regarding post-apoc vehicles, here's a tank idea that never went anywhere in reality (from the July 1936 edition of Popular Mechanics), but could certainly show up in a post-apoc world. I must admit the inability of the gunners to actually SEE anything could pose a problem (snicker), but if you used a bit of transparent aluminum, you could solve that problem... :-)