This is the large 3" straight wall .500 cal double rifle with two folding sights as well as built in pop up peep sight. Barrels are 28" with strong rifling, all the proof marks underneath. Barrels have been reblued at some time but strong markings.  Receiver is completely engraved and is now in a basic gun metal color.  Wood is superb with sharp checkering and nice grain. This is a hammer gun with under lever barrel release.  Serial #4028 is all matching on barrels, rec and forend.  Loaded with proper black powder level loads, this old Indai/Africa big game rifle should be a blast to shoot.   Antique so we can ship right to your door.