Here's a quite rare, original manufacturing prototype from the pioneering prop and miniature licensed replica company, Icons.
It's a prototype taken off a screen-used Cylon helmet, created at Icons' North Hollywood, California facility in 1998.
As you can see by the pictures depicted here of this historical piece, it is a true testament to Icons legendary emphasis quality, which set a new standard in the licensed entertainment collectible industry. Which still effects quality standards in the Hollywood memorabilia replica and Toy collectible business to this day.
Icons was therefore provided rare access to an original Cylon costume, conducted extensive R&D and proceeded to mold and master an original Cylon helmet, to create its Universal Studios licensed 1:1 scale replica. Complete with electronic roving red-eye and a sound effects chip that was motion controlled, so the eye would turn on and a voice would say "By your command".
Cut and mounted on cardboard. Must have been done by Rob Klein, 15 years ago !!!
To my knowledge, only 5 Cylon helmet prototypes were ever produced at Icons and only 3 of them were chrome-plated.
A historic collectible in its own right (at the time, Battlestar Galactica had not been revitalized yet. Long before the new, re-booted TV show).
You can read the bottom portion of the text, referring to the Icons Colonial Viper Fighter Miniature !!
Those COAs never got farther into development / revision.