That's a dinky little gun Pete. Looks like it might have been restocked as it has nice wood for a $10 gun. Thinking on I do have some .360 and .380 centrefire rook rifle shot cartridges in my collection. I have always assumed they were for occasional pot shots with the rifles as I have never seen a dedicated shotgun in this calibre. Virtually all the English and Belgian garden guns were single barrel. Lagopus.....