The only ones I have at the moment are a double side by side top lever hammer gun by Rosson of Derby with one barrel .300 Rook and one barrel .410 shot. It was made like that not having one bored out; a sort of mini Cape Gun. The other is a bored out to .410 by Ebrall of Shropshire with a top lever and side hammer. It shoots very well. I did have a nice original octagonal barrel .360 No.5 but sadly it went in order to put towards another gun I was after. They are worth seeking out as they will never be made again. That Holts one above will now be worth a third or quarter of its value than if left original. Lagopus…..