It is common chain mail with 5 rows of gold trim along the bottom of the chain shirt. Along either arm is a row of 3 gold rows of links that follow the arm up and meat at his neck where 3 more gold rows of links surround the neck.
The mail was lost on the last campaign the King went on. He was expertly captured and ransomed by an unknown group. The ransom being paid, they released the King but kept all his belongings, including the chain. Now the King wants it back.
The suit of chain was King Inturt’s father’s mail and his father’s father and so on for many generations. While the mail is not incredibly strong, it holds much importance in the kings reckoning.
Most any person over thirty will most likely recognize the chain mail if shown it. Very few armorers will not recognize it if it the players try and sell it.