Sword (Link's Awakening)

The Sword, also called L-1 Sword is an item from The Legend of Zelda: Link's Awakening. During his Shipwreck Link lost all his items. After he washes up on Koholint Island the only items he can find are his Shield, which is given to him by Tarin and his sword which he finds washed up on Toronbo Shores. The Sword can be effectively used against most of the enemies Link encounters and can later be upgraded by collecting twenty Secret Seashells.

Theory
When Link first finds his sword the game reveals it has his name on it implying it was used by Link in his previous adventure mentioned in the manual. This adventure is commonly believed to be the events of A Link to the Past. In A Link to the Past, Link wields two swords, the Fighter's Shield and the Master Sword. The ending credits shows Link returning the Master Sword to its resting place in the Pedestal of Time and states it was never drawn again meaning the Sword featured in Link's Awakening could be the Fighter's Sword.