The following info. is from the PHOTO '87 INFORMATION ALMANAC by the Editors of
Modern Photography:
On the back of American made packages of Duracells is a stamped date code.
The first digit is the last digit of the year of manufacture.
Next is a letter representing the the month, arranged alphabetically, A - L.
The next two digits are the day of the month.
The last letter represents the U.S. factory.
Example: "4J08X" indicates Oct. 8, 1984
Gray market Duracells do not have a stamped code.
A list of U.S. factories corresponding to the last letter of the code, was not
provided.
Regards,
Larry Zimmer
tektronix!tekigm2!larryz
Oh No another beautiful theory ruined by facts!