Yes.... Grand Trunk SF exp which runs between Chennai and New Delhi
Sorry it overtook TN not GT
It may be old but no longer popular, several trains which came later on were given importance. You can see even it has no LHB in 90th year of run while so many trains which came even last year were given LHB. It is okay if you told about TN and not GT but I was telling the sorry state of GT only.
Sorry i typed wrong it overtook TN at Sindhi not GT
In SL of TN it had around 75% occupancy thats it