Okay, I 'hope' honesty is the best policy...
Not to burst your bubble, but...
If you look at the metal edges of your firearm along the frame, they are more rounded than one would expect to see. Also, the interface between the side plate and frame is fairly evident, not 'nearly' seamless, as one would expect. Coupled with the colouration of the bluing, which is not consistent with Smith & Wesson bluing from that era, it all points to an obvious polishing (thereby rounding edges, etc.) and reblue.
Lastly, the bluing appears 100%, which it is, as reblued. If the bluing were 100% (and not reblued) I would expect the grips to be in a similar state, or at least nearly so (much sharper checkering/detail). The grips on this particular firearm are well worn. It would be almost impossible (I say 'almost' as never say 'never', but nothing particular comes to mind to explain extensive wear with100% bluing, other than a reblue) to have worn grips, at least worn to this extent, on a firearm with nearly 100% original finish.
Don't shoot the messenger!