If the SN has a K in front, it is a 1962 shipped gun.
I think boxes of this era had the label but someone else here knows for certain. If the top mentions Bangor Punta it is a later box.
The Target stocks of this era were not numbered to the gun, even if original. Yours are from a later time, no earlier than 1968, since from the photo there is no diamond-shaped uncheckered wood around the stock screw (I think).
The grips do have what I have seen called the football cutout on the left side. I have seen some earlier target grips that are a lot like them but don't have the football.
The paper work/parts list has a date of 1967 on it. (I think)
So it must all be put together from different guns?
According to the standard S & W reference, yup, 1962.
The football or extractor cutout on the left panel started in the early 1950s and went into the early 1980s. Until 1967 a small uncheckered diamond went around the stock screw, so yours appear to be from after then.
No need to fret over the mismatched stuff, you have a nice gun. Enjoy!