Shimanos code system:
Shimano Year
|
A
|
1976
|
2002
|
|
B
|
1977
|
2003
|
|
C
|
1978
|
2004
|
|
D
|
1979
|
2005
|
|
E
|
1980
|
2006
|
|
F
|
1981
|
2007
|
|
G
|
1982
|
|
|
H
|
1983
|
|
|
I
|
1984
|
|
|
J
|
1985
|
|
|
K
|
1986
|
|
|
L
|
1987
|
|
|
M
|
1988
|
|
|
N
|
1989
|
|
|
O
|
1990
|
|
|
P
|
1991
|
|
|
Q
|
1992
|
|
|
R
|
1993
|
|
|
S
|
1994
|
|
|
T
|
1995
|
|
|
U
|
1996
|
|
|
V
|
1997
|
|
|
W
|
1998
|
|
|
X
|
1999
|
|
|
Y
|
2000
|
|
|
Z
|
2001
|
Shimano Month
|
A
|
January
|
|
B
|
Febuary
|
|
C
|
March
|
|
D
|
April
|
|
E
|
May
|
|
F
|
June
|
|
G
|
July
|
|
H
|
August
|
|
I
|
September
|
|
J
|
October
|
|
K
|
November
|
|
L
|
December
|
** thank you to Vintage-Trek.com
Sheldon brown has good Shimano info here
1st Flight has good in depth info on Shimano here
Shimano PDF Catalogs:
1978
1982
1989 (German)
1991 (German)
1992 (German)
1994 (Japanesse)
1996 XTR only (German)
