Mod. 29 date of manufacture?

[Target Zero]

Hi guys, any help for me here?

S&W, Model 29-2 .44 Magnum
6.5" pinned barrel
Target trigger, target hammer, red ramp front site.

sn. S237xxx

 

[P&R Fan]

Looks like early 1964.

 

[Target Zero]

Thank you!