It is thought that the following codes, stamped on the Rolex Clasp, signifies when the watch was assembled at the Rolex factory.
A = 1976
B = 1977
C = 1978
D = 1979
E = 1980
F = 1981
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 or T = 1994
W or T = 1995
V = 1996
Z = 1997
U = 1998
X = 1999
AB = 2000
DE = 2001
DT = 2002
AD = 2003
CL = 2004
MA = 2005
OP = 2006
EO = 2007
PJ = 2008
PL or LT = 2009
RS = 2010
The number behind the letter(s) seems to be the month the clasp was produced.
So, for example, LT2 would be February 2009
A = 1976
B = 1977
C = 1978
D = 1979
E = 1980
F = 1981
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 or T = 1994
W or T = 1995
V = 1996
Z = 1997
U = 1998
X = 1999
AB = 2000
DE = 2001
DT = 2002
AD = 2003
CL = 2004
MA = 2005
OP = 2006
EO = 2007
PJ = 2008
PL or LT = 2009
RS = 2010
The number behind the letter(s) seems to be the month the clasp was produced.
So, for example, LT2 would be February 2009
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