Both sets are recordings of live performances in their respective venues.
Die Walkure on jacket; Die Walkuere on labels. Issued in a gatefold jacket, blank (white) inside, and with a two-sided page (English and French) of performance information and notes. The commentator is introduced on Side A by the president, presumably of the SF Opera organization. Neither is otherwise credited on the release. The notes state: In the second act of Die Walkure, we find four singers who, even in this golden age, were considered incomparable in their respective roles. This performance is believed to be the only time they performed together on the operatic stage. The catalogue # is listed as EL004-2 (spine), EL004 2 (jacket rear), EL 004 (2) (notes pages) and EL 004 (label). Matrix / Runout: EL-004-2A (Side A runout, etched) Matrix / Runout: EL-004-2B (Side B runout, etched) Matrix / Runout: EL-004-2C (Side C runout, etched) Matrix / Runout: EL-004-2D (Side D runout, etched)