Help with manufacture date, please.

[speedingbullet]

Would some kind soul let me know what the manufacture date is on a 2", square butt, J Frame, Chiefs Special serial #55J7xx. I'm in the middle of a move and all my reference books are boxed and packed away.

Thanks in advance with your help on this.

Best regards to all !

 

[s&wchad]

1971-72