237 FOUR TRACKS RIGID VEHICLES, HEAVY 5

Lizard Amphibious Vehicle

Lizard amphibious vehicle from China, 2019, tested by engineering company Qingdao Wuchuan Heavy Industry (part of the state-owned shipbuilding corporation China Shipbuilding Industry Corp-CSIC). It's the world's first amphibious unmanned surface vessels (USV).  https://www.navalnews.com/naval-news/2019/04/chinas-marine-lizard-amphibious-usv/

Forwarder Home Built

Forwarder that moves like a spider over the stones. The cab sits at the front. Home built by  Ove Möller in Gräsbo in Östervåla, Sweden.
https://www.youtube.com/watch?v=mUOb9hnBU6w

Nodwell Four Tracks 8T

Nodwell four tracks 8T built by Jack Nodwell in 1965 and sold also by Thiokol. https://issuu.com/uofaengineering/docs/enggmagfall2010web/26, http://www.unusuallocomotion.com/pages/industrial/nodwell-canadair-flextrac-et-foremost.html