Genuine Case BoneStag® has evolved from genuine jigged bone treated under an open flame exactly as they treat Genuine Stag. This beautiful treatment gives each handle a unique golden brown look. This striking family of knives from W.R. Case and Sons has the unique designation 6.5. Because the handle is made of bone, it should have a pattern designation of “6” and because of its Stag appearance it has been given a “5”. Therefore, the “6.5” pattern number has been created.