Pau Riba / OM - Dioptria 1

First original spanish pressing on Concentric label, housed in different back cover and complete with the attached 12 pages booklet.... really difficult to find now! . Musically one of the highlights of the spanish catalan underground psych progressive scene , beautiful M- condition , NO RING WEAR ( near impossible to find like this) and also with the rarely seen original concentric PVC outer cover !!!