Alton Barnes 1990
From The Crop Circle Ship Wiki
The model of the Large Tetrahedron Structure can be applied to two similar formations from 1990. These two were found on the same day.
The structure can easily be applied to formation 1.
However, the second formation only has two spheres shown.
The two formations are taking different pathways through the structure. This means that the position of the 'Misc Watersphere' objects should be in the opposite order in each formation, and they are.
Formation 1 (Green line shows the path taken.)
Formation 2 (Green line shows the path taken.)
 Also see