Here are some additional pictures that show the interchangeability of the X frame S&W "Tamer" grips with an N frame 629. Keep in mind these grips also fit the round butt K, L, and N frame as well as the X frame. That includes the 69 and the 66-8. Perhaps seeing the frames without the grips will provide some help....although their "feel" with each individual frame can be different based on weight, barrel length balance, hand size, etc....
Sevens.... Your clear description of the frames and their history was excellent!
Sevens.... Your clear description of the frames and their history was excellent!