SOIUX FALLS, S.D. (AP) _ An acoustic guitar Elvis Presley smashed during his final tour has sparked a custody fight between a South Dakota museum and a collector who insists he's the rightful owner.

Now a federal judge must sort out whether blues guitarist Robert A. Johnson even technically owned the broken instrument last year when he donated it to the National Music Museum along with one of Bob Dylan's harmonicas and a guitar made for Johnny Cash.

The National Music Museum insists in a lawsuit that it is the legal owner of the guitar the rock-and-roll king played during his 1977 tour. He gave it to a fan in St. Petersburg, Florida, after he broke it when a strap and string snapped.

Collector Larry Moss says Johnson sold him the guitar earlier.