Looks good to me, but I am no rebluing expert...Usually the folks that know these things say to look at edges for rounding, flat spots, side plate gaps and faint or missing lettering on the barrel or frame.
I will get some close ups later this evening. I suspect that it has been reblued ‘cause it’s just too dern purdy. Plus it looks a bit thick if that makes any sense. Be back later.
Clear close up pictures of the markings and side plate seam are the best indicators. S&W finishing did vary over the years so some may be deeper blue than others
O.P. From the appearance of the sideplate seam and screws that gun has not been re-finished. Even a factory re-finish will show very slight rounding of the sideplate seam and the area around the sideplate screws, and the photo shows they are absolutely sharp!
What I look for in a Smith that I suspect has had a reblue is #1 the front of the extractor Where you push to extract empties should be in the white. rebluers seldom clean the blue off of it. 2nd is the base of the pin usually covered by target or magna grips but can be seen with service grips is buffed flat during prep for a reblue.
SWCA 892