Unmistakably a bootleg on double vinyl album, with general sound and recording inefficiencies, as you can expect from a bootleg reproduction. Santana's 1977 tour however is very interesting from an artistic point of view. (A big part of this album's track listing can be found back on the official and highly acclaimed "Moonflower" LP/CD, which also reflects Santana's '77 European tour). I think I am holding a collector's item of this unofficial album on the (Russian?) DOL label (obviously 'manufactured in Europe'), since the label information on side 1 is listing incorrectly John Coltrane & Don Cherry's "The Avant Garde" (2 tracks), whilst the right 5 tracks, as listed on the sleeve - "Dawn", "Zulu" , "Let the children play/Jugando" , "Black magic woman/Gypsy queen", "Dance sister dance (Baila mi hermana") - have been pressed into the grooves.