'Mango Walk' The Chosen Brothers & Bullwackies All Stars (Dubwise Version, 1979)

Don't know much about the artist, The Chosen Brothers (or just Chosen Brothers), other than this discography on Roots Archives or this track; but it'd be hard to find another piece of music from the same era with the same feel, with all those eccentric psychadelic/progressive rock elements, and the earnest delivery of very basic lyrics (yes, about buying mangoes at the market).