I think there are problems with the eq curve used and stylus shape in your attempt to play the record. The RIAA equalization curve was standardized in 1954. Anything recorded before that could have used another curve. The eq curve used would have a big impact on the sound of the recording when played back. Playback equipment needs to use the eq curve used by the recording device. A mono cartridge fitted with a conical stylus of the size used to cut the disc is needed to get good sound. I think a better way to hear the recording would be to play it back on analogue equipment of the same time period of the recording.
