Winterthur's Frech-Hoch-bodied Saurer GT 560/640-25 trolleybuses were the first three-phase current trolleybuses built. Shortly before being replaced by new low floor trolleybuses, number 128 was photographed at Oberseen.
{{Information |Description=Winterthur's Frech-Hoch-bodied Saurer GT 560/640-25 trolleybuses were the first three-phase current trolleybuses built. Shortly before being replaced by new low floor trolleybuses, number 128 was photographed at Oberseen. |Sourc