Many a time Indian Postal Department issue more than one stamp on the same day. Between 1947 and 1974, on various occasions, more than one stamp has been issued on the same day. Such stamps were issued in ‘Set’ depicting a specific theme or subject. Issue of such ‘Set’ continued even after 1974 i.e. after the introduction of Se-tenant stamps. Such ‘Set of Stamps’ depicting a specific subject and issued on the same day can be a very good collectible on FDCs. In Se-tenant stamps, two or more stamps of a particular subject are joined together and issued either in the form of Miniature Sheet, regular sheet or sheetlet.  While in ‘Set of Stamps’, such subject is presented in two or more separate stamps which are issued on the same day in separate sheets.All the stamps issued on the same day form a ‘Set’ and if they are affixed on one First Day Cover, such FDCs will be as colourful, attractive and interesting as Se-tenant FDCs.Moreover, a ‘Set of Stamps’ on First Day cover has its own philatelic worth as the FDC has some design on the cover along with the First Day Cancellation. During the pursuit of collecting such official FDCs with ‘Set of Stamps’, one may also find some First Day Cancelled Private covers or Special covers having some thematic and artistic design appropriate to the ‘Set of Stamps’.