4Z 780 then 4Z 799 at Johannesburg
Sishen → Johannesburg → Port Elizabeth
Timetable, Johannesburg time
18:304Z 780 from Sishen at the gate
18:154Z 799 to Port Elizabeth leaves the gate
23 h 45 apart on the timetable, overnight
4Z 799 leaves 23 h 45 after 4Z 780 arrives on the timetable: more than half a day, so not a connection we count.