Medieval King Leonidas Spartan Helmet 300 Movie Helmet W/ Red Plume By NauticalMart. Collectables, Militaria Medieval Greek Spartan King Leonidas Armor Helmet, Spartan Helm. High Quality Hand made replica at affordable Price, Antique. Can it be used for reenactment ? : Yes We supply this helmet pre oiled for protection from rust. Use this helmet as a great Halloween costume