RCA Victor Custom Record Division

RCA Custom Record Division was a mastering and pressing operation providing services to third-party record companies on a contract basis. Known to have been pressed in two of RCA Victor's pressing plants, Rockaway.

For 45RPM pressings a date code in the matrix identifies when the record was mastered; it is the first letter and number of the eight-digit matrix number up to 1954. In 1955, RCA changed its system slightly so that the first letter alone represented the year.
E0 - 1950
E1 - 1951
E2 - 1952
E3 - 1953
E4 - 1954
F - 1955
G - 1956
H - 1957
J - 1958
K - 1959
L - 1960
M - 1961
N - 1962
P - 1963
R - 1964
S - 1965
T - 1966
U - 1967
W - 1968
X - 1969
Z - 1970
A - 1971
B - 1972
C - 1973
D - 1974
E - 1975