Schwerer Gustav railway artillery 80cm 1/285 6mm (RTPYM95WM) by 3dtankfactory
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Amazon.com: General Jim's Military Brick Building Set - World War II Army Heavy Rail Cannon Train Railway Car Building Blocks Model Set for Military Enthusiast, Teens and Adults. : Toys & Games
It's not LEGO:KAZI German 80cm k(e) Railway Gun DORA Review - YouTube