The best source for making a research into this issue is a relief of The Cathedral of the Holy Cross on Aghtamar Island, in Lake Van in eastern Turkey, is a medieval Armenian Apostolic cathedral, built as a palatine church for the kings of Vaspurakan. Have a look at this scene of the battle between David and Goliath from the cathedral. In my opinion, this relief is a perfect source for researching medieval armenian armour, because Goliath is dressed in two types of armour: lamellar (like a “poncho”) and scale.