Great collection. In table No 40 of 1987TT, I was also looking at Tata-Madras/Bokaro-Madras Exp...later on became Tata-Alleppey/Bokaro-Alleppey & further extended to Dhanbad. Earlier Tata was the important junction for this slip service. They should try and keep the same TT for Tata-Ernakulam train as shown here with night dep from Tatanagar & also touching VSKP. Will be useful for passengers. The return TT is almost same from Madras now ( Dep around 20:15hrs) with speed up.