#### U.S. Pioneer Hi Fidelity serial numbers

MONTH of production: (2nd letter of serial number)
-----
A = Jan
B = Feb
C = Mar
D = Apr
E = May
F = June
G = July
H = Aug
I = Sept
J = Oct
K = Nov
L = Dec
YEAR of production: (1st letter of serial number)
----
A = 1954 or 1980
B = 1955 or 1981
C = 1956 or 1982
D = 1957 or 1983
E = 1958 or 1984
F = 1959 or 1985
G = 1960 or 1986
H = 1961 or 1987
I = 1962 or 1988
J = 1963 or 1989
K = 1964 or 1990
L = 1965 or 1991
M = 1966 or 1992
N = 1967 or 1993
O = 1968 or 1994
P = 1969 or 1995
Q = 1970 or 1996
R = 1971 or 1997
S = 1972 or 1998
T = 1973 or 1999
U = 1974 or 2000
V = 1975 or 2001
W = 1976 or 2002
X = 1977 or 2003
Y = 1978 or 2004
Z = 1979 or 2005

Sometime after 2000 ? they may have changed the serial-# setup and now put the manufactured date on the unit.

I wonder if the government had anything to do with that, since I have seen dates on other brands ?

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