Main thing is that it appears to be the correct shape for a Pembridge Great helm.
If it is just painted I am going to strip all the paint off, may even remove the 3 vertical strips and replace with real brass.
Be cautious of it. I bought a blackened helm from them (Medieval Collectibles), and after stripping the blackening, the steel is kinda, well, seems to be garbage. I'm not even sure what kind of steel it is, but it's awful. That one might be fine, but my experience wasn't so great.