Thank you all for any advice on this pistol. After looking through the similar posts I would like to see if anyone can confirm it is a First Model, and if the proof marks show it is a civilian model. Listed as First Model and mistakenly as .45 in the store, then corrected to .455. Just not sure which version, which once known I will purchase it.
I am including the pictures that I have of the pistol that includes the serial number from the butt, although it seems there might be a letter missing. It is stamped .455 CTG and unfortunately, I didn't get a measurement of the barrel but appears to be 6". Sights are simple fixed sights, with a strain screw on the grip strap, a swivel, and 5 screws.
I am hoping for some confirmation of it beging first model and how to test for .455 chambering? I think I saw something stating you could put in a .45LC, but I don't know if then that means yes .455, or no?
Sorry for any lack of info and please let me know if there is more you might need.
Thank you!
I am including the pictures that I have of the pistol that includes the serial number from the butt, although it seems there might be a letter missing. It is stamped .455 CTG and unfortunately, I didn't get a measurement of the barrel but appears to be 6". Sights are simple fixed sights, with a strain screw on the grip strap, a swivel, and 5 screws.
I am hoping for some confirmation of it beging first model and how to test for .455 chambering? I think I saw something stating you could put in a .45LC, but I don't know if then that means yes .455, or no?

Thank you!