Usually faded Hammerheads have only greenish limbs, but this one has got a greenish neck, too.
That is one point that makes me think this is a different figure than the usual (faded) green limbed Hammerhead.
Under your halogen lamp he looks like common brown limbed Hammerhead.
I´ve never seen a Hammerhead with green neck before...only saw a couple of this.
Maybe this one has not faded completely? The legs look partially brown, dont´they?