Most picklehaubs are leather. The exceptions are royal guards, ceremonial troops, etc. The different cockades on the sides show origen. The red, black, white is for Germany and the orange,yellow would be for the Baden region.
Chile still has hundreds of these which are worn at the cadet school. They are of original German manufacture and the only difference from an original officer's pickle (brass spike, trim and mailplate chinstrap) are the Chilean shield on the front and the color of the cockades. I have an example that also includes the rare horsehair plume.
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