No the Altmann's had a lot of actual scratches in it. Deep gouges and what not. I guess it could be one that someone filled in the scratches on. I am leaning toward the ms2 or ms3
Try posting some better pics... some that arn't so fuzzy and maybe a side and back view, taken from a distance, so we can see the "true" shape of the helmet.
But yeah, if I had to guess I would say it's along the lines of a Sgt Fang helmet...
It's deffinetly not an altmanns helmet, For one the gouges are one thing and even if they were filled in, the altmanns manibles are excessively wide and the openning for the t visor is over sized. In All the altmanns looks a bit stubby.