This helmet is based on the "Brocas" helm, now in the British Royal
Armories. The bracket on the front of this helm would lock down over a fitting
on the breastplate, while the buckle on the back would be attached to a strap
from the backplate. This would render the helmet immoveable against the impact
of the three-pointed lances used in the joust. The plates making up the front
surfaces of this helm are much heavier than those in back.