In the included October 17th, 1994 dated copy of the U.S. Army technical report titled "Development of Anthropometric Analogous Headforms" it states, "The overall goal of the CTI study is to design three manikin headforms ---small, midsized, and large -- for use in military ejection seat and crashworthiness testing, as well as retention and fit assessment, of helmet and head-supported devices." Both appear to be made of brass, with one finished black and attached to a metal pedestal, would work well for helmet display heads.

Both are very good showing an attractive, lightly aged patina overall with minimal wear.