The Hallaton helmet

[jho]

Thanks for the great photos.

In fact, I do not believe that - except for extreme cases - the angle of the front rim is a secure indication of whether a mask or cheekpieces were fitted. Quite a few helmets of this type come to mind which combine an angled front rim with cheek pieces or at least rivets for cheek pieces:

unprovenanced, Axel Guttmann collection AG-461

unprovenanced, published in ANTIKE WELT- Zeitschrift für Archäologie und Kulturgeschichte. Band 5/2008 „Die Soldaten Roms“

unprovenanced shown on the website of the Museum at Mougis

(provided the foreoging are genuine)

Vechten, found during construction work on the Rijksweg

Xanten (Rheinisches Landesmuseum Bonn Inv. RLMB 86,0069,01 Mil-17)