![](//images.45worlds.com/t/78/elvis-presley-with-the-jordanaires-baby-i-dont-care-rca-78-t.jpg)
Comment by liskeard78s:
I have this 78. You say '1957' but the J matrix code = 1958, this issue at least.
(In case anyone wonders, D4,D5,D6 = 1944,45,46, &c.;
E2,E3,E4,F2 = 1952,53,54,55;
G=56, H=57, J=58, K=59, L=60, M=61, N=62, P=63, R=64, S=65, T=66,
and so on up to 1972 when they got bored with it..
Found this info in "Vinyl Dave's Book of Favourite Record Labels" - I can confirm those numbers. (Sometimes an old recording can have a later matrix code, e.g. especially with regard to Jim Reeves, as each disc has its own matrix no.)