What year did 629's drop the N serial #?

[Witryantum]

I was curious what year did 629's drop the N serial #? Are the N serial number guns more desirable?

Thank You
RW

 

[Witryantum]

I was curious what year did 629's drop the N serial #? Are the N serial number guns more desirable?

Thank You
RW

 

[diamonback68]

I believe it's 1983.