[78-L] RCA matrix coding - date

Thomas Stern sternth at attglobal.net.invalid
Sat Nov 1 17:45:38 PDT 2014


When did the matrix prefix codes on RCA pressings

using a letter to indicate date begin ???

Was it 1950 "A" 

Most writeups about this start at 1955 "F"  ...

Thanks!

Thomas.



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