Does anyone remember how to get the rear sight off a M - 59 First generation. Bernie

Sorry, that is a S & W model 59 first generation. Bernie

I'll have to go check but I think you have to remove the firing pin block safety first.

I had already removed the safety, firing pin and the safety detent.
So, I brought it home with me and had 3 beers after dinner ( my wife always said that I was a smart SOB when about half drunk, then I remembered that all you have to do is lift the front of the tang, or tab,and using the tang as a tool turn the sight 90 degrees and lift it up.
What screwed me up is the cut that looks like a dovetail, is only for the 2 tabs that are holding the sight in, to be freed. Hope this makes sense, because it is a very easy job.
Bernie