All this pics enough to say that all this WAG12 are functioning in and around the SER, ECoR and SECR.
This pics are of SER.
1. First pic is near Vishnupur, SER. Credits: Anubad
2. Second pic is near Ghatsila, SER. Credits: Dr Soham DB
3....
more... Third pic is near Purulia, SER. Credits: Sumit pramanik.
For SECR you open forum for station like Korba, many WAG12 pic you will find more pics. Specially for korba pics are taken by our IRI Member Rf Praveen Mishra.
Same with ECoR also you may see it.