Ahoy ! The intent of the question is to hear the collective wisdom of the list, including of those who are dedicated to authenticity. If the frame is dated year "X", would it be considered an authentic restoration if the components were a mix of production years "X-1 year", "X", and "X+1" year ? This to account for on-hand stock, date of frame fabrication and actual build-up date of the bicycle. Thanks. Richard Cielec Chicago, Illinois; U.S.A.