The unique Trichtingen torc consists of an iron core with a silver mantel. It’s too large and too heavy for human use (6.7kg), it was rather worn by a wooden cult image.
Dating 2nd/1st c. BC.
Photos: Landesmuseum Württemberg
https://www.landesmuseum-stuttgart.de/sammlung/sammlung-online/dk-details?dk_object_id=388