If original 1976-77 U.K. punk seemed barebones to mainstream rock fans, Sham 69 seemed simpler yet. Surfacing in London from Surrey’s bucolic Hersham, its songs lacked the withering disgust of Sex Pistols, the cutting cultural barbs of the Adverts, the wild abandon of the Damned and the art-attack smarts of Wire, X-Ray Spex and Manchester’s Buzzcocks.