I think either the CC shown here is wrong or something wrong at the CRIS.
14 2S coaches implies 14 x 106 seats which will never touch 1833. Even if you take it as 17 it will not touch 1833 seats.
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As for the record number of 2S, I think there was a 21-22 coacher 2S train run by SR to...
more... GHY during the north east exodus problem 2 years back.