Since 1974 Leupold has incorporated a letter date code in the serial number of each scope. The prefix, beginning with the letter E, was advanced each year. In 1993 the letter changed to a suffix, and was moved to the end of the serial number. Any scope without a letter in the serial number was produced before 1974. The following is a list of the date codes for each year of production.


Prefix:

E - 1974 J - 1978 N - 1982 T - 1986 X - 1990

F - 1975 K - 1979 P - 1983 U - 1987 Y - 1991

G - 1976 L - 1980 R - 1984 V - 1988 Z - 1992

H - 1977 M - 1981 S - 1985 W - 1989


Suffix:

A - 1993 B - 1994 C - 1995 D - 1996 E - 1997 F - 1998 G - 1999 H - 2000 I - 2001 J - 2002