YouTube Video by Mr. Santulan Mahanta & he says: "12237 led by LDH WDM-3A #18850 reached 110 within 7 minutes of departure from BSB. The old loco showed tremendous performance. In the middle of the video 12370 HW-HWH Kumbh Express also shows up led by a HWH WDM-3D"
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PS : It can be seen in this video that the Track Doubling has improved trains' speeds between BSB & SLN. If this Alco Deemer is speeding by smoking then think that an Electric Loco will be breezing through that too without smoking :-D