Originally Posted by Larry Johnson
This was easier than trying to find it on the internet. Hope you can read it. The one screw is for hammer tension the other is a extra locking pin for the cylinder pin. The adjustable sight is only on the 38
I have one. Iver Johnson in 38 Special. Blued. Stamped 38SP on the barrel. It also fires 38 Special 38 S&W does not fit.
A pic of the IJ On the Grips.
And the Barrel Stamp:
Loading gate side
On Left 38 S&W on right 38 Special
Note the 38SPL goes in the 38 S&W does not
With the screw you can adjust the trigger tension to almost nothing. Remove the grips and the sping is right there.