First age amulet

The first age amulet provides an XP boost for Prayer of 1%. The boost runs out 30 days after the item has been won, unless a recharge gem has been used on the item. Once the boost has run out, the item will become cosmetic. It can be retrieved from Diango if lost.

This item is only available on the Squeal of Fortune from 15th March 2013 to the 18th of March 2013, but was released the 12th of March.

The above statement is incorrect as stated by Jagex in the game update post:

All of these items can be won on Squeal of Fortune from Friday 15th March 00:00 GMT until Monday 18th March 23:59 GMT. The First Age outfit and Coin of Balance will be become permanent additions, but you'll have a greater chance to win both this weekend.