02-20-2012, 09:08 PM
M. Junkelmann, "Römische Helme", ill.10 & 11 has the same image you posted plus one of the inscription. I can send you a copy if you PM me your email address but it will not add much to what you have already found.
Regards,
Jens Horstkotte
Munich, Germany
Jens Horstkotte
Munich, Germany