Okay I was watching The Big Valley Season 1, Episode 25 called "Into the widows web" and towards the end of the show, the woman who I believe is Ann Margret playing the widow, is put to the test of being able to shoot a SAA or not. When she cocks the SAA I spot the hammer which is missing a pinned firing pin. So I rewind back to that point and screen shoot it with my cell phone.. as I figure they'd be using SAA's of the time era they are in.. is this a blooper?
It would be the Single Action that the sheriff is carrying.
https://simkl.com/tv/7278/the-big-valley/season-1/episode-25/