I believe most of the 67s shipped with magnas but I have an early 67 no dash with stainless sights and it is wearing service grips and if it didnt leave the factory that way, they sure fit it like it did. An easy way to know is to remove the grips and see if they have a serial number and if so it should match the gun.
The usual rule in my observations is target-sighted guns had the flat bottomed Magnas, but never say never with S & W. They may put on whatever is in the parts bin at the moment .
My 67-1 came with a beat-up pair of targets with the deep cutout on the left panel for speed loader. Original? Who knows, it was probably a police trade in and had seen a lot of carrying and some abuse when I bought it. It now has a nice pair of the same style of targets, purchased off a table at a recent OGCA show. It seems content that way.
I've owned several NIB Mod. 67-1's of which I've been the original owner. All that I've seen were delivered with magnas.
As with many S&W handguns, they could be ordered with target stocks and perhaps a TH and a TT. I've personally never seen a bonafied, as originally shipped, NIB 67-1 with rounded service type stocks....
But as earlier stated -- never say never with S&W.