Battery date stamp

[Russell A.]

Does anyone know how to decipher the date stamp on a 1965 AC Delco battery? Mine shows what appears to be SJJ

[Michael J.]

Re: Battery date stamp

They are stamped YMS, Year in numerical, Month in letter, S is the source plant code. My December built '64 is 3LV, V is Olathe, KS, where most Corvette batteries came from. Your code doesn't fit the format used originally.

[Larry M.]

Re: Battery date stamp

If the stamping is actually "5JT" then it would read/decode as:

1965
October
Muncie, Indiana

Larry