Rare genuine Roman battle weapon 4 blade spear HEAD large ballista bolt head

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Roman iron spear blade large bolt head /3-4Cent.ADNice, interesting and absolutely original iron QUAD blade spear - bolt head measuring 205mm. in length, 122gm. You are bidding on an original Roman iron spear blade - ballista bolt head. As pictured. Please note images can be enlarged. Authenticity guaranteed, see below.The ballista ( Latin , from Greek βαλλίστρα - ballistra and that from - βάλλω ballō , "throw"), plural ballistae , was an ancient missile weapon which launched a large projectile at a distant target.Developed from earlier Greek weapons, it relied upon different mechanics, using two levers with torsion springs instead of a prod, the springs consisting of several loops of twisted skeins . Early versions ejected heavy darts or spherical stone projectiles of various sizes for siege warfare . It developed into a smaller sniper weapon, the Scorpio , and possibly the polybolos .Greek weaponThe early ballista in Ancient Rome was developed from two weapons called oxybeles and gastraphetes . The gastraphetes ('belly-bow') was a hand held crossbow. It had a composite prod and was spanned by bracing the front end of the weapon against the ground while placing the end of a slider mechanism against the stomach. The operator would then walk forward to arm the weapon while a ratchet prevented it from shooting during loading. This read more