The Agatha Christie Indult or the SSPX? Which is responsible for the continuation/preservation of the Real Mass

 Well, it ain't the SSPX (Protestants in Fiddlebacks).

1971, Bishops in England and Wales came to him, armed with a letter from numerous scientists, artists and intellectuals, many not even Catholic, telling Paul VI that his desire to destroy the Latin Mass was an act of destruction not just of Catholic civilization, but of Western Civilization. Even though they were firmly committed to celebrating the Novus Ordo, the bishops were sympathetic to this argument, and asked Paul VI, for the good of the Church, to consider a change. Paul VI issued what is known as the "Agatha Christie Indult" (because the non-Catholic author Christie was one of the prominent signatories of the letter), allowing a bishop to give permission to celebrate the TLM when it was judged for the good of the Church....

http://unamsanctamcatholicam.blogspot.com/2022/11/guest-post-retreat-to-ivory-tower.html

http://www.trueorfalsepope.com/p/sspx-page.html