manufactured in the 56-60 time period, need to get a dimensioned drawing of the cylinder lug retaining screw from the right-side frame ahead of the trigger.
Possible new SIL, has a need for replacement sscrew and according to S&W that time period used common screw of the J-frames, as the I-frame was being phased out.
Also, ID the thread as the tapped hole in frame may need to be chased.
Thanks.