Wolverine's Dog Tag was a military ID tag that belonged to Wolverine. It is a necklace showing a number which is 45825243-T78-A. The tag was given to James Howlett just before his skeleton was bonded with adamantium at Alkali Lake, and he chose the epithet "Wolverine" based on Kayla Silverfox's story. He kept it following his memory being erased by Stryker, and throughout his aimless wandering in the Canadian Rockies it served as the only reminder of his past life.