Nearly 50 years ago, Randy Bachman's Gretsch guitar – on which he wrote "American Woman" and other hits — was stolen from a hotel in Toronto. Decades later, the instrument has been returned to him by a Japanese musician who had bought it at a store in Tokyo, unaware of its history. Bachman, former guitarist for the Guess Who and Bachman-Turner Overdrive, was understandably distraught when he first noticed the guitar had gone missing in 1977. It was the first expensive instrument he'd ever bought as a teenager, having worked odd jobs to save up the $400 for it. "I...