Serial Numbers and other identifying marks are not really necessary are they? If the part is conclusively identified as from a 777 then it has to be MH370, there are no other relevant hull losses. Some news outlets are stating that Boeing personnel are on their way to Reunion, which would not be happening if there had been any definite evidence excluding MH370. But anybody want to take a bet that if it is from a 777, within hours there'll be suggestions that it was intentionally planted?