Since the inception this train belongs to ECOR and SCR is no way related. but according to number allotment ECOR,SER n few zones have to allot numbers starting with 8. and anyways 2 is added before for superfast. so due to no availability of number they have utilized SCR series starting with 7 (or 27 for superfast) now as number system is revised a fresh slot starting with 2 is assigned so as it resembles ECOR. Even BBS-PUNE exp number starts with 125 which is actually NFR series. now even that trains number is being changed to 8 series