Arabic Rolling Block Rifle

[trenchwarfare]

Recently acquired this very unusual rifle. Remington mfg. It is in a "musketoon" configuration, but is a cut-down long rifle. Shows many years of hard use. Markings do not match any of the known military contract weapons. Many were purchased by Egypt & Sudan, but this isn't one of those. Also purchased by Ethiopia, Morocco & French North Africa, Persia, Turkey, Yemen, and Israel. The markings of none of these nations are present on this rifle. The left side, has what looks like a unit number. The rest... that's why I'm here. Could someone please translate what is marked on this piece. It looks as though, some of the markings on the right side, are under the rear sight base.

Also, are there any ideas as to what the stylized "bird", on the right side is. Could be a clue as to ownership/history. The rawhide repair at the wrist is cool, in that there is no seam. The leather must have come from the animals leg, as a single piece. There is also a bullet, embedded in the right side of the butt-stock.

Any assistance is very much appreciated.