Keith,

For what it's worth, the owner confidently told me that the barrels were three different bore sizes. None of the photos that he sent me have the entire water table in the image. So, don't know about the frame size markings.

I told the owner to let me know when he gets the gun back in his hands. I hope that he can bring the gun to my shop, so I can take good photos and measurements.

Steve Culver
Steve Culver Knives