Hey Mahlerbro Man π
Do you know this record?
https://www.allmusic.com/album/mahler-lieder-early-recordings-1915-1949-mw0001855892
I love it. It's got that real-time thing going on in a big way, both in performance and recording quality. Plus, it contains what I think is Jascha Horenstein's first recording.
A lot of historical significance, but more than just that.