Bahla Fort Gate Cannon.
So what is this weapon?? The P and Crown appear to be proof marks ...The numbers not pictured over the thick end of the barrel would give the weight in hundredweight quarters and pounds...see site below for details and mathematics.
Ibrahiim al Balooshi.
Note;Pictures Courtesy of David Lockwood.
I viewed
http://www.treasurenet.com/forums/sh...-markings.html for cannon marks and discovered some how to spot the cannon weight and other details...worth logging .