Those pictures are from Berserk? I remember reading it a while back, in the manga they had tons of late 16th century armors. Later in manga Griffith's new Merc group were all wearing this kind of armor, like the exact same armor.

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There was also some chapters where you have a guy wearing a sallet, and some guy in the back ground wearing coat of plate and a bascinet.

Gut's armor is somewhat special, I think Prince armory can work something out. If you want fiber glass Andrew Galevskiy's facebook page has them, you need an account on facebook to view.