Hey, nothing to forgive. The beauty of this forum is we're all here to learn. Even the most knowledgeable ones among us learn from the Q&As such as yours . . . that's how they got so smart!

Misty, as usual, is right on the date. I can only add that the three alpha plus 4 numeric serial number format began in the early 1980's and remains today.

Enjoy that model 60 . . . they're pretty special revolvers to many of us.

Russ