Nice retro feel to the models.
The Nordheimer, Aesir and Vanir, do not wear plate. There is no evidence in Howard that they wore anything heavier than what he termed mail. There is no mention of plate armor in "The Frost Giant's Daughter", the only story in the Conan canon dealing exclusively with the Nordheimer. This could be interpreted as most likely chain or it could include possibly include scale. Plate armor would be reserved to the Hyborian nations, Aquilonia, Nemedia, Koth, Zingara perhaps Ophir and Argos. It would be cost prohibitive and limit mobility greatly for a raiding force like one would see from the Nordheimer. Plate armor is what nobles can afford, particularly the cavalry portion of an army, which would be the main portion of any of the Hyborian kingdom's armies.
There is no evidence in the Howard texts that the Vanir wore horned helmets, however in "Queen of the Black Coast" Conan is wearing a helm of Aesir make which is horned. I do not have the story right in front of me, but I belive they are described as being bull's horns.
At any rate, I am hijacking the thread unintentionally, they are fine old models with a great nostalgic feel.
Ryan