Interesting article about the Kalkriese mask!

[Peroni]

He also suggests that the four holes at the sides could have been used to attach staps or cords which could loop around the ears to hold the mask in place.

Here's my take on the holes in the mask.. Perhaps they were used to hold the edging in place similar to the system seen on some of the imperial Gallic helmet neck guard edgings?

http://i20.photobucket.com/albums/b242/ ... semask.jpg

Admittedly, the lower pair of holes might have been use to pass a thong or attach a strap that passed around the back of the helmet neck guard similar to the method employed on the Ribchester helmet.