I think that this was the Ex Sealdah - Jaipur Superfast later converted into Sealdah - Ajmer (Shariff) Superfast Express. I wonder that is this train a better option than Sealdah - Ajmer Ananya Express via Patna or not ;-D
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PS: I had seen this train entering Asansol Jn from the opposite (Dhanbad) side when my 12357 had entered over there for it's 1st halt. This train was standing opposite to my coach window seat. I had taken a snap but later I deleted it since it was a shabby photo due...
more... to the train's close up and my seat window's shabby glass... LOL :-D