Self evident, the 949,

and a 618, stainless steel Model 18, tapered barrel no lug.

and a 641

Wide target hammers for the Models 63 and 317
and the inclusion of the .500 wide hammers on the 617.

I remember the 617-5 (6-shot, MIM, IL) usually coming with a .500"-wide target hammer. The -6s (10-shot, MIM, IL) usually ship with the .375"-wide semi-target hammer, but the target hammers from the -5s should fit.

S&W lists it as part # 293660000 ("HAMMER ASSY .500 (STIRRUP NOT INCL.)") in their Revolver Parts List. There's another .500"-wide MIM target hammer listed, part # 228080000, but that's for the -4, which was MIM but pre-lock (which could work in a -6 if the lock were removed).

A 618 would be a lovely thing indeed! I wouldn't mind a 616 in .32 magnum either....