This 1756 Bible is covered in goatskin and has metal clips to hold it together when closed. This is an interesting way to bind a Bible. This type binding is called “do-si-do”. Google says that, “A do-si-do book, like the square dancing move with your partner, swings between two signatures. These books are like two books in one and are excellent for dual purposes, like drawings and notes, or double themes like opposites or pairs.” I may try this someday when I get bored. That’s code for never.