The book, "Collecting Shotgun Cartridges", by Ken Rutterford is the best reference book in relation to British shells.
Try Gunnerman books @ 248-608-2856.
10 G; Shells of this period were drawn brass,or paper tube with over shot card wad and rolled edge closure.The shell base was almost always brass,stamped with the gauge and makers name. Boxes were two-piece construction.The overshot wad usually carries the shot size,whilst the paper tube,in most cases gives the makers name and is often accompanied by a brand name. The top half of the box normally incorporates an impressive makers label.
