Really great tandem

This was bought by my mother in law and originally came from Chillicothe Ill. . She bought it used around 1965 and they did use it , they moved to Canada in 1970 and brought the bike here to Williams Lake B.C. and i know that we rode it here also , it has no markings or numbers anywhere that we can find , would love to here what you think of it. We just bought it from her and want to have it restored .