Early mono curves for Stereo records

[Fabbro]

Hi all,
I’m Fabrizio from Montreal Canada.
I am a record collector and I am interested in a very specific topic.The use of equalization curves pre-Riaa for Stereo records pressed after 1954.
In my opinion Decca/London records sound better with the Decca/London curve and sometimes, for very early 1950’s stereo pressing,even better with the Nab/Columbia curve.
What do you guys think and if there’s any evidence for this theory, that the record industry used other curves than Riaa even during the Stereo era.
Thanks
P.s
I know very well the link of Michael Fremer that called this theory B.S.

[apoklis]

I haven't finished reading it, but this may have some info on what your looking for. MANUAL OF ANALOGUE SOUND RESTORATION TECHNIQUES
by Peter Copeland

[Fabbro]

Thanks for your answer

[Fabbro]

I haven't finished reading it, but this may have some info on what your looking for. MANUAL OF ANALOGUE SOUND RESTORATION TECHNIQUES
by Peter Copeland

Thanks!
The answer might be at page 147 6.63

[oldvinylcollector]

There weren't any "very early 1950s stereo pressings". Decca issued their first stereo LPs in the autumn of 1958. Decca's test disc of 1957 (mono only) says that all Decca records are made according to the British standard which is the equivalent of RIAA. There were at least 3 different iterations of the Decca FFRR curve before they changed officially to RIAA on January 1st 1956.

[Fabbro]

There weren't any "very early 1950s stereo pressings". Decca issued their first stereo LPs in the autumn of 1958. Decca's test disc of 1957 (mono only) says that all Decca records are made according to the British standard which is the equivalent of RIAA. There were at least 3 different iterations of the Decca FFRR curve before they changed officially to RIAA on January 1st 1956.

Hi
I wanted to say,” very early Stereo records from the 50’s “ ,my mistake