 The World War I tank shown in the episode "The Devil Wears Armor" is an M1917 (aka Six Ton) tank, an American-built version of the Renault FT. Its gun is not authentic.The M1917 was first ordered in 1917, and the first example was produced in late 1918, four years later than the series' 1914 setting.The MPC (Model Products Corporation) model company released a 1/25th scale model kit of a Stutz Bearcat as a tie-in with the series.