Closed helmet circa 1630

[Lansquenet59]

I understand, however, it is not because this model has never been seen, that it never existed. It may be an adaptation of the time, because it remains functional. I found an identical model, as a closed funeral helmet in a church. I think mine is not funeral, no holes anywhere.
(Image source: https://www.pinterest.fr/jamesbshannon7/funerary-helms/)