Details of abbreviations :

CR= Central Railway, ER=Eastern Railway, ECoR=East Coast Railway, ECR=East Central Railway, NR=Northern Railway, NCR=North Central Railway, NER=North Eastern Railway, NFR=North East Frontier Railway, NWR=North Western Railway, SR=Southern Railway, SCR=South Central Railway, SER=South Eastern Railway, SECR=South East Central Railway, SWR=South Western Railway, WR=Western Railway, WCR=West Central Railway.