Front loco :- 30277 GZB P-7 with Digital Indicator Board generally on-duty with Kalka or CDG Shatabdi, the dirty one.
Rear One :- 30399 GZB P-7 coming all the way from ASR, the whiter one.
There seems to be an issue with 30277 being attached to 12952 as can be seen curious on-lookers digging their eyes on the front of 30277,