According to New TAAG
this one also given Slac,but still FAster than SDAH duronto 10 mins in Up n 5 Mins in Down
12249 Sa Howrah-New Delhi 1A
Howrah (Dep) 18.40
New Delhi (Arr) 11.25...
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12250 Su New Delhi-Howrah 1
New Delhi (Dep) 19.45
Howrah (Arr) 12.35