Kolkata Metro: The only Metro of IR. কলকাতা মেট্রো : তিলোত্তমার জীবন রেখা ।। - PPG

sj was always oted by 12557 the dly has bcms rglr for sj and sj is jst a sf exprs and saptkranti has advntg of iso crtfd yes bsk was oted when it gets lates and u r tlkng abt saptkranti ot it is not psbl i rglry track both the trains from last 6-7 mnths and i did not see it hpns 12557 dlyd at lko outer always near barabnki and in down too and one tym i wtns the ot of saptkranti when its loco got fail and otherwise it will nvr oted by sj track both for 1 mnths u will get the answer urself.

---