Limited edition of 1957 pieces longines watch flagship heritage 60th anniversary limited edition l48174762 longines celebrates this year the 60th anniversary of its first flagship collection for this occasion the watchmaking brand introduces the flagship heritage 60th anniversary 1957 2017 this numbered steel model houses an l609 mechanical calibre in its 385mm case and is produced in a limited 1957 pieces edition the brushed silvery dial is adorned with 8 indexes and 4 arabic numera