Bengaluru, Feb 22 (ANI): A unique stall of the Indian postal department containing postal stamps of aero shows and old aircraft attracted visitors at the Aero Show 2015 in Bengaluru city. Indian postal department has exhibited stamps released on aero shows since 2003 and pictures of old aircraft on the stamps. Various national and international companies participated in the five-day biennial air show where they showcased defence equipments of the world's leading defence suppliers. Post Master General of Business Development and Mails department, Veena Srinivasan, said the stamp exhibition was based on aero philately. The commemorative stamps commemorate any event or occasion while definitive ones are usually seen in correspondence. Items like mugs and lettersets with stamps embossed over them were also exhibited at the gallery.