Welcome aboard.
That product code lists a 3 inch, 7 shot, bead blast finish, unfluted cylinder. The CDJ4XXX is correct to that revolver.
I have never noticed one of these before. Not sure how rare it is, but I like it.
Is that a dash 5 (located on the frame when you open the cylinder, 686-?)
Wow you know your S&W. Yes - 5 it is.
Thanks for all the comments.