John,
Thank you.
It's for a customer and he provided the pictures of the original, so it's O/U cause the man with the money gets to decide.
I have it regulated for a 50gr FFg load at 30feet, but since it's truly designed to be used as a last resort against Tiger that leap onto your Elephant, you could really load it up as much as you wanted because it will still be accurate enough at Howdah Basket length.
It has rifled barrels.
Correct the Right lock is top and the left is bottom. Front trigger works top/right and back trigger works bottom/left.
Colin