Onboard one of my favorite train and RSA in ICF era, which is restored back in LHB version now, the legendary 12633 Chennai Egmore - Kanniyakumari Superfast Express from Tambaram to Tiruchirapalli hauled by Royapuram WAP - 7 30556! one can see train board in kannada. probably SR gave a rake to SWR it seems, this rake is still with SR markings. B2 is humsafar coach in this rake.