"When did the abbreviation Ky begin being used?
Post Office started in 1963, for mail sent before that date the State name was written out completely
If the barrel markings are post 1963, it may indicate the work done to the barrel time frame"
The P.O. mandated 2 letter state abbreviations in 1963 with both letters being upper case and not followed with a period. Prior to that abbreviations for the states were used regularly however many were more that 2 letters (Mass. for Massachusetts). They began with an upper case letter with the rest being lower case and followed by a period. The marking on the barrel is Ky which could be any year prior to 10-1963.
Post Office started in 1963, for mail sent before that date the State name was written out completely
If the barrel markings are post 1963, it may indicate the work done to the barrel time frame"
The P.O. mandated 2 letter state abbreviations in 1963 with both letters being upper case and not followed with a period. Prior to that abbreviations for the states were used regularly however many were more that 2 letters (Mass. for Massachusetts). They began with an upper case letter with the rest being lower case and followed by a period. The marking on the barrel is Ky which could be any year prior to 10-1963.