S&W models,
032
431 PD
432 PD
16-4
631
632


One of the .32 H&R magnum's favorable attributes is that it offers .38 Special energy levels and allows a small-frame revolver to hold 6 cartridges, whereas a similarly sized revolver in .38 special would only hold 5 rounds.
Penetration is also increased compared to the .38 special with bullets of the same weight.

Old thread with pic's of many can be found here:
Recommendations Sought for revolvers chambered in .32 H&R Magnum