Шлем стража
#257052
Magic 
Helm All Lv 55 Gear
Helm All Lv 55 Gear
Market
Not tradable — TradeType is Not, so it can never be listed.
Sells for
Stat lines
Защита +240
How to obtain
Not reachable from any drop table, box, shop or reward in the client data — most likely handed out by a server-side system: attendance, the battle pass, mail, limited events, coupons or Steam-achievement rewards.