Clint,
Sounds like the gun I saw at Camp Eggers here in Kabul on Friday and posted on the Double Rifle, Paradox Guns Forum here. Here's the description with the S/N 1646 on the bottom rib, the clincher for making it the same gun:
"What should appear at the Kabul Cape Eggers gun dealer but a cape gun, marked Army & Navy CSL, back action sidelock, hammers that can be bolted, with a Jones underlever. The gun uses extractors. The forend comes off with one of those old fastenings that slides across. Steel barrels with a dolls head; back sight has one folding leaf marked 50; front sight a bit beaten down. Four Proof marks on the flats: from the breech forward they are: London Provisional proof for barrels; London View, the numbers 39 (NOTE: 400Nitro kindly identified this as the gauge and equal to .500 cal.), and London definitive black powder proof. On the bottom rib some inches from the flats are the numbers 1646. The serial number of the gun, found on the trigger bow is 937, confirmed on the action flats. Steel butt plate. LOP is my estimate about 14 to 14-1/4.
The gauge/caliber are not marked [See above correction.]. The right barrel appears to be 16 gauge, but might be 20. Barrels are clean inside with some dings on the outside, but no dents. The left rifled barrel with wide lands and grooves fits a martini-henry cartridge according to the dealer (577/450). Asking price is $1,800."
Regards, Tim
