Coalfield was also express train with 13029/30 number before getting 12339/40 number in 2005/06. Now 53029/30 uses that number as 13029/30.
Agniveena or Bidhan was numbered 13041/42 & now uses 12341/42 number since 2005/06. Still called Bidhan by ASN-DGR-BWN belt. Black got 22387/88 number from 2014 onwards. Black was supposed to get 12387/88 number from ECR, but DNR division blocked that number after 12387/88 became 13257/58.