John Lee Hooker was still churning out R&B-influenced electric blues with a rhythm section for Vee Jay when he recorded The Country Blues of John Lee Hooker, his first album packaged for the folk/traditional blues market.
He plays nothing but acoustic guitar, and seems to have selected a repertoire with old-school country-blues in mind.
It's unimpressive only within the context of Hooker's body of work; in comparison with other solo outings, the guitar sounds thin, and the approach restrained.