Not long ago, i bought a lot of Star Wars Costumes and things (that i am selling most of them) from an Australian guy, that lives in the Philipines, and inside the lot it was this Boba helmet.
It is made of Resin with Fiberglass, with the accessories in metal.
It looks to me like a Don Post recast, but i am not sure...
I have a BM, an Altman and a MR, and this one is just a little bit smaller.
(Click on the pic to make it bigger)
Could anybody give me more info please?