Interesting double there Keith. I own a side by side mini cape gun that is .410 shotgun and .300 Rook Rifle by Rosson of Derby; a hammer top lever with express type sights. As for Drillings I also have a double 16 bore and the lower barrel has been converted to .22 rim-fire by Griefelt of Germany with detachable claw mount telescopic sight. The side safety moved forwards allows for the two shotgun barrels to be fired and moving forward the top safety converts the front trigger to fire the rifle and also pushes up a sight along the rib if used without the scope sight. Damned ingenious in a way. Lagopus.....