1956 BSA HP Sporting Rifles Instructions,5" x 8-1/4" closed and opens to 20" x 8-1/4".One side when fully open pictures an 18" cut-a-way view of the rifle with parts numbered.At the bottom of the page is a listing of the numbered parts with name.The opposite side has care & maintenance instructions and ballistics chart for 17 cartridges.It is dated "Jan.1956". Very Good condition with some wrinkles and staple holes