RIAA's "Grammy Hall of Fame Recordings"

This would be Wagner – Der Ring des Nibelungen (Ring Cycle) with Sir Georg Solti conducting the Vienna Philharmonic on London Records but I’m not sure of the correct date since the source list shows links to both 1958 and 1967. It was inducted by the RIAA in 1998. Anyone who knows the correct info can feel free to enter the year…and correct the link if needed.