So I shot some photos.
Here, the first one shows the interior of the helmet. Note the orientation of the liner to the helmet, and also the chinstrap fixture placement.
Next, here's the creative size marking on the leather liner. Words fail me.
Exterior rivet installation. I suspect these may have been set by hand!
Three shots of the ridiculously sharp edge.
Two shots of the liner suspension ring installation, a shining example of the "if it doesn't fit, force it!" method of assembly. Note the deep bend, which places the liner ring fully .5 away from the shell at the deepest bend. I mean, really, WTH is going on here?