S&W Model 41 born on date?

[PX15]

I just traded into a nice used S&W Model 41 (from the original owner). The serial number is: 77XXX.

Anyone have a clue as to the year of manufacturer for this pistol?

Thanks!

J.

 

[TOM BECKWITH]

1967-68 period - Jinks can give "ship" date