Darn good memory...thanks It was driving me nuts Mannix...He wore the first small of the back holster I had seen....Started a trend for a while..
I don't think much of that carry, and Jim Wilson, the ex-sheriff turned gun writer, told me that if you get knocked down in a fight, the holster position can easily cause spinal injury.
Otherwise, I liked Mannix, but preferred Peter Gunn. It was a more sophisticated show than most.
Another show that I liked then (I guess I was maybe 12) was, Adventures in Paradise, with Gordon Somebody. When he had a a gun, it was a Webley MK IV .38. He kept it hidden on his boat, sailing near Australia.
I'm almost certain that Peter Gunn had a M-36 or 37 S&W, but can't recall if it had the early small triggerguard. It would have had the flat cylinder release. I think the show was gone by the time that that changed, about 1966.
I tried to find Peter Gunn on the Imdb database, but couldn't. But I'm almost sure about the Chief's Special. Not sure, but I think he carried it crossdraw.
The detectives of that era seem more real for their times than many do now.