WW1-era Pioniertruppe A7V-Schützengrabenbagger LMG trench digger of the German Army, c. 1918. Only one was produced.
Previously:
1946 hand-built trenching machine - video
Belt-driven tractor with giant trenching wheel - GIF
V-trenching excavator - GIF
WWI mechanical trench-digging machine - GIF
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