Trains 177 & 178 are the Kertajaya, Ekonomi class only, air-conditioned. The Argo Bromo Anggrek (the Bromo Orchid) is Indonesia's premier train, linking Java's two largest cities in 9 hours at a creditable average speed of 80 km/h (50mph) start to stop on its narrow gauge tracks.
The train keeps up a relentless 110 km/h (75 mph) between the few stops it makes, hooting ceaselessly at each level crossing, speeding non-stop through most smaller stations on its 9 hour dash - the same journey would take 15 hours by road.
Once in Bandar Lampung, there's a twice-daily train to Palembang.
Here are the details, feedback if you travel this route would be appreciated.
Trains 51 & 52 are the Taksaka Pagi, Eksekutif class only, air-conditioned. Approaching Cirebon you'll see the vast shadow of Mt Cereme in the distance to the south, its summit usually hidden by cloud.