I have to disagree with you on this one Rocky.Although they are old,the oldest have been around since 1972 which means that they ae well built trains.Believe me when you ride one of these old dogs on the new haven line going over 70 MPH:tup:But I respect your opinion.But I forgot you mentioned the M4 which is basically the same,but are built by Tokyu car corp of japan 1987.Yonger than the M2 and run in triplets.Only 54 of the triplet cars:(