I'll chime in as a member of the no dash club, 1972 model 2K73XXX and the original target grips are in the drawer right behind me I just like the way these sit in my hand better.
Duty action job by Tom Kilhoffer in the mid 80's. Silver medal- off duty pistol- 1990 Illinois Police Olympics in Chicago. Easy to clean, won't rust. Carried off duty and on duty (Investigations). Work horse and pretty as well.
I had to bring mine out again, including my newest 66-2 3"
My 66 collection, a 2 1/2" 3" and 4" no dash guns, and my 6 1/8" 66-1, along with my latest addition 66-2 3" gun. (5 altogether). My 2 1/2 and 4 inch guns were my service revolvers used during my career.