Raimey,
The "F" with the crown over it is in script, but it does not appear to be an intertwined "CF". It is located to the left of the load data on each barrel. There is a T near the SN on the underside of the bottom barrel, it is upside down relative to the SN & it's a little hard to see due to all the scratches there. I can also make out what appears to be "17/1" and next to that is what I think is a "16" inside a circle, both near the SN.
Below is a picture from inside the receiver showing the "U" w/ the crown over top and also another mark that I'm not sure how to describe, but it is also found under the barrels as least 2-3 times.
What are your thoughts?
