Extremely rare Original factory NOS trannsmission case to fit Norton P11, N15 twins, also Matchless G12, G15 twins and G80 singles. MINT unused condition. What is really nice about this case is that it has not been stamped. All you have to do is stamp in your numbers from your old case or whatever number you need to complete your restoration. Very hard to find a NOS case at all let alone an unstamped one! I have lots of other P11 parts also.