The Numero Group’s meticulously curated and expertly packaged Eccentric Soul series showcases independent soul music from the ’60s and ’70s. The label rescues true gems from these micro-scenes, which would otherwise be lost to the heaps of 45s, LPs and master tapes getting dusty in disorganized basements.

Previous Numero releases have focused on Chicago and Detroit, but the series came to D.C. last year with the release of “Who’s Going to Save the World,” an LP by long-lost Adams Morgan band Father’s Children. The group also features on the new “Eccentric Soul: A Red Black Green Production,” a collection of engineer Robert Jose Williams’ largely unreleased 1970s recordings made in his parents’ basement in Silver Spring.

RBG Productions clients Skip Mahoaney and the Casuals, Dyson’s Faces, the Summits, East Coast Connection, Promise, and the Exceptions, above, all reflect the R&B and soul that dominated the era: smooth and chart-friendly. But none of these groups broke through to major-label stardom like Williams had hoped, and RBG Productions wound down by the end of the ’70s.

Thanks to Numero, Williams’ work won’t be lost to the dustbin of history.