I don't think this one has been mentioned before. Good that the cheek pieces were found with it.
https://arkeonews.net/sicilian-seas-yield-rare-roman-helmet-from-241-bc-naval-clash/
https://www.finestresullarte.info/en/archaeology/sicily-a-helmet-from-the-241-bc-battle-of-the-egadi-recovered-at-sea
Intact Roman helmet from the First Punic War recovered from the sea | Archaeology News Online Magazine https://share.google/dx5LEaBOQnA2lZOJ9
Have we had this one before?
Yes, two days ago. https://soa.org.uk/sm/index.php?topic=9859.0
Oh bugger...