The crowned helmet of Gustav Vasa, with a crown of chased steel. this helmet was bought in Augsburg in 1541 by merchant Claus Heijder. At first glance, I would have thought this to be the work of one of the Großschedel's, yet it is presumed to have been made in Nürnberg by Master Plattner Kunz Lochner.
This unusual helmet is part of the collection at:
Livrustkammaren (Royal Armouries) Stockhom/Sweden