Ralph,
After studying the pictures, I suspect that what appears to be a cross bolt safety (immovable pin) is secured by the screw in front of the trigger guard (somewhat like the screw that secures the base pin on a first generation Colt single-action). I think that you are correct that it secures the barrel to the receiver. Please do not attempt to drift it out with force! I also do not see the second screw in the grip area under the toggle that John observes. I do wish to speak to the owner if he is receptive. You can provide his phone number in confidence to me at
rwood1@elp.rr.com
Thanks,
Ron