R59 Date Code Deciphering

[Mr70]

As Steve referenced,and to add,that's not the number 1 after the letter J,but the letter I for the Battery plant code.
Some Delco plant codes I've recorded:
I=Muncie,Ind.
C=Anaheim Ca.
G=Fitzgerald,Ga.
K=Olathe,Ks.
N=New Brunswick,N.J.
R=Korea
Z=Oshawa,Canada

The Letter I was not used to identify the Month,but it was for the Assembly Plant.
10 is the day this battery was made.

[mockingbird812]

Originally Posted by Mr70

As Steve referenced,and to add,that's not the number 1 after the letter J,but the letter I for the Battery plant code.
Some Delco plant codes I've recorded:
I=Muncie,Ind.
C=Anaheim Ca.
G=Fitzgerald,Ga.
K=Olathe,Ks.
N=New Brunswick,N.J.
R=Korea
Z=Oshawa,Canada

The Letter I was not used to identify the Month,but it was for the Assembly Plant.
10 is the day this battery was made.

Ah, love the details Rick - thanks. The casing at the bottom states that the battery was made at the Anderson Indiana plant - is that in Muncie? So, if this stamping is near the bottom of the case, why is there a code with the same info on top of the case?