I just picked up the same model last month.

The Pachmayr grips that originally came on it were for the K-frame round butt with the enclosed backstrap - the ones you are showing are open back.

The one I bought came with a non-standard set of Pachmayr grips, but I had a set of the correct grips in my "stuff I might need someday" rack.

No box with mine either - paid $950 for mine.
My addiction to 3" S&W continues... Model 29-4 added

Still haven't taken it to the range - I need to do that.