I can't find an NRA model 629-2 in my S&W catalog and is that the factory grip?
If you could give me the first three letters and the first couple of numbers of the serial number, I can give you a bit more information.
“If ye love wealth better than liberty, the tranquility of servitude better than the animating contest of freedom, go home from us in peace. We ask not your counsels or arms. Crouch down and lick the hands which feed you. May your chains set lightly upon you, and may posterity forget that ye were our countrymen.” ― Samuel Adams