Clay artifacts

[guindlin]

Does anyone know anything about these artifacts or where I might find a reference.
I saw them in a book about 30 yrs. ago. and now a friend of mine has them but I can't find the book any more.

 

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[Msbeepbeep]

You may get a quicker answer in the Artifacts Forums or Collectors Forums farther down the forums list.
Looks interesting GL!