District Level Philately Exhibition Darpex - 2021 was organized at Darbhanga from 3rd to 5th September 2021. During this exhibition two special covers were issued.First cover issued on 3rd September on newly commissioned Darbhanga Airport and the other one on 5th September on the Mithila Cultural Symbols.
Cover Code: BH/12/2021
Cover Code: BH/13/2021
Courtesy: Lalit Kumar Mishra, Patna.