Please post an inside picture.
This looks like someone recasted an older helmet and repainted it. The visor is too wide and not original to many helmets that have ever been sold.
I also see some fiberglass on the top part of the helmet and the ears might be from a don post helmet.
There are only so many helmets in certain materials.... vinyl, fiberglass, liquid cast urethane, etc.
But if someone recasted another helmet they could use whatever. We can rule out helmets made after 2005. More pictures would help.