The history of this train is very unique..
Earlier the Northeast Frontier Railway ran a normal SF type train from Kamakhya to Pune Via MLDT , ASN , BSP , NGP , BSL & DD
Check image for TT ,
PA KYQ Express used to run on Thursday from Pune , later PA KYQ Express converted as PA - SRC AC...
more... Express on different route & different day Via PNVL , NK , BSL , NGP due to some issues with NFR ,
Then it was converted into Primium Then Suvidha to earn more money ЁЯТ╕ЁЯТ╕ЁЯТ╕ and on 2018 it was regularized as PA SRC HUMSAFAR..
:-(