This knife is a Tony Bose pattern Backpocket by John Lloyd. The covers are Nguni horn . It is 4-5/8" closed ,blade is 3-5/8" with 3-3/8" of cutting edge .Opens to 8-1/8" OAL. Blade & spring are CPM-154 stainless . Liners ,pins ,inlaid shield and bolster are stainless . Smooth snappy 5+ to 6 action. Feels great in the hand ,nice full size slipjoint folder by John Lloyd. 
​$600.