This is the muzzle of Fox XE 16 made in 1921.

The gun is in excellent original condition with unturned screws, 40% case colors, original blue. The gun is choked 19 and 19. The right choke is 3-3/4" long and the left choke is 2-3/4" long. There is a parallel in each muzzle of about 3/4". The parallel is very well polished and I think it may have come from the factory that way. The barrels are 29-15/16" long. They are actually 29-29/32" long. Minimum wall thickness on one barrel is 0.048", the other is 0.031". There is no keel in the bottom triangle. A friend has a Fox 16 D grade that is also without bottom keel.
Hard to explain but the barrels have a chamfer or bevel that quits at the ribs.
Now I don't know if it is cut or not but I should have the factory information on barrel length in the next day or two.
The first person to post the correct answer is the winner. The prize is a personalized autographed picture of me with my dogs and the gun. By personalized I mean "To my good friend (Insert your name here), AmarilloMike". The winner will need to pay a small handling and postage fee.
Thanks to Joe Wood for the excellent picture.
Here is a link to my Photobucket site with another much larger picture:
http://s98.photobucket.com/albums/l274/AmarilloMike/Fox%20XE%2016/Best,
Mike
Edit - The bores are 0.657" and 0.658"
Edit - It has a "Paul Jaeger" recoil pad on it - obviously not original.