I apologize for the blue tone in the pictures. I don't know what I did. But for now, at least everybody can see the markings. the side plate says something like experimental or what? the side plate number on the inside does not match the number on the frame. there are no proof marks on the right side. What you see is what I see. It is single action. So, help me out here. what is it? Is it collectible? is it unusual? is it??? whatever? all help appreciated.