Western Railway would be the Country's first Zone, where the Headquarter and the Associated Division uses 1990-2005 Made Coaches for their trains. And all their New 2011-2014 are Distributed to other Divisions/Coaching Depots like Indore, Ahmedabad, Rajkot etc.
Carefully Observe once. Prestigious trains and Even new trains are made to Run with Old Coaches in Mumbai Like Golden Temple Mail, Avadh, Paschim, Jaipur SF, Avantika etc.