Identify these Carter Carbs

The letters are the month of the year.
A B C D E F G H J K L M The letter I (eye) is not used.
The last number, say 6 7 8 9 0 is the year in the decade of production.
60's 70's 80's 90's
Sorta, kinda, gotta know the years the carbs were used in production, and manufactured.
Easy, peasy, once you know how to figure it all out.