Helmet style
 

Has anyone seen any helmet as depicted in the De Gheyn engravings from about 1607 as attached

Welcome to the forum, David :).
A good question indeed. Could it be that this helmet style is only a fantasy 'created' by the artist ?
A pity Allan Senefelder has not been around for a while. He might have something (a lot ?) to say about this.

Hello,

not exactly this helmet but I would call it "Morion helmet" and the man somehow looks spanish to me.


Roland

Is that the way you view it, Roland ?
Curiously it didn't strike as being that :o .

.

Hi Fernando,

I mean the mustache and the beard :).

An alternative name for this helmet is "Cabasset".

The Cabasset is much closer to the helmet in the picture.

The Cabasset has been developed from Morion/Ironhat style helmet in the first half of the 16th ct..

A direct translation from Freakypedia:
"The high helmet bell of the Cabasset was surrounded by a narrow brim and resulted in some specimens in a curved back apex, also they could have on their front a low ridge. It is common in this helmet shape that the comb ends in a spiky tip. The cheekpieces of the helmet were usually pushed, so composed of several steel plates, and provided with chin straps. The Cabasset was widely used among foot soldiers and was in use until the middle of the 17th century. It was made in the simplest form, but also decorated with artistic, driven ornaments."

Looks like an exaggerated stylised pear stalked cabasset to me .

The tiny spike is of high interest for me. I wonder what is it good for?

The ancient Celts had a similar forward oriented spike on their helmets but bigger.
Perhaps it's just a question of fashion.

I expect it was just fashion