I would like to see some inside pics as well, close ups on a few of the rivets and cut washers wouldn't hurt. I'm picking up a few flags from the pics there are ie. the nasal bar has no rivet set at the top to keep the bar from sliding out of its bracket when the set screw is loosened ( this may indicate that just the bar has been replaced ), the fit of the top/upper most lame of the tail plates demonstrates a larger curvature than the bowl of the helmet ( the little wings of the plate edge sticking out from the sides in the rear pics ) which may indicate it is either a replacement from a different helmet or from a later date. The last, and this may not be anything but other helmets of this decorative type ( which is normally ascribed to be German although I've seen a few deemed to be Swede ) with the fluted bowls, the peak plate is usually more elaborate, multipointed in a star pattern or punched and filed, as is the finial atop them.
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