Well... It's certainly not from The Eagle, Centurion, The Last Legion or Gladiator.
It looks like a rather fantastical interpretation of an elaborate late Roman helmet, but the fin is a-typical. Also, as there is no liner, I have the suspicion this maybe is a display piece, rather than a wearable prop?
The sword is strange too; it's shaped like a late Spatha (mainly due to the taper of the blade), but has the length of a Gladius, but with a way too small pommel. Which also makes this a fantasy, rather than a historical sword.
To be honest; I have no clue... :confused