Gamma (4)

Mexican label run by Gamma, S.A., the Mexican affiliate of the Spanish Hispavox, S.A., managed by Tomás Muñoz (3) (later Spanish CBS founder in 1970).
Publishing company Gamma, S.A. Ediciones Musicales
Runouts could determine some manufacture differences, the stamped runout and the "U" at the end means the lacquering process was into the Gamma's own labs & studios