The choice of eq curve is stated on the record jacket, pre 1955. It does not go by year, but by maker. You can search the Internet on appropriate matchings. All the optional eq curves and RIAA are the inverse of that used when cutting the record and should be used accordingly, not for effects as some audiophiles think. I use the EMI and Columbia curve in the Boulder 2008.
Riaa curve
How important is riaa accurcy in a preamp? Some state .5 db...others .25