The hero knows one unique weapon (Excalibur, Old Betsy, Sting) like the back of his hand. When using that weapon, he adds +1 to his Fighting, Shooting, or Throwing rolls. A hero can take this Edge multiple times, applying it to a different weapon each time. If a Trademark Weapon is lost, the hero can replace it, but the benefit of the Edge doesn't kick in for two game weeks.

Savage Worlds Deluxe Edition p. 40