[quote="FourWinds"]Pictures from halfway down this page - http://www.uwm.edu/Dept/celtic/ekeltoi/volumes/vol6/6_20/alberro_6_20.html

There seem to be similarities between the helmet in Fig.2, and these hats:

http://en.wikipedia.org/wiki/Golden_hats#Gallery_of_all_four_known_golden_hats.2C_for_comparison