1987 Indian Trees

1990 Science and Technology 1990 The 25th Anniversary of Border Security Force 1990 Greetings Stamps 1990 Cities of India 1990 Bhakta Kanakadas (Mystic and Poet) Commemoration 1990 The 300th Anniversary of Calcutta 1990 The 700th Anniversary of Dnyaneshwari (Spiritual Epic) 1991 The 75th Anniversary of Banaras Hindu University 1991 International Traffic Safety Conference, New Delhi 1991 Gandhi 1991 The 7th Triennale Art Exhibition, New Delhi 1991 The 125th Anniversary of the Death (1990) of Jagannath Sunkersett (Educationist and Railway Pioneer) 1991 The 50th Anniversary of Tata Memorial Medical Centre 1991 Endangered Marine Mammals 1991 International Conference on Drug Abuse, Calcutta 1991 World Peace 1991 Launch of Indian Remote Sensing Satellite IA 1991 Babu Jagjivan Ram (Politician) Commemoration 1991 The 100th Anniversary of the Birth of Doctor Bhimrao Ramji Ambedkar, Social Reformer 1991 Tribal Dances 1991 Ariyakudi Ramanuja Iyengar (Singer and Composer) Commemoration 1991 Jan Nayak Karpoori Thakur (Politician and Social Reformer) Commemoration 1991 The 30th Anniversary of Antarctic Treaty 1991 The 60th Anniversary of New Delhi 1991 Sri Ram Sharma Acharya (Social Reformer) Commemoration 1991 Keshav Shankar Pillai (Cartoonist) Commemoration 1991 The 20th Anniversary of the Death of Sriprakash (Politician) 1991 The 100th Anniversary (1990) of the Birth of Gopinath Bardoloi 1991 Rajiv Gandhi (Congress Party Leader) Commemoration 1991 The 100th Anniversary of the Birth of Muni Mishrimalji, Jain Religious Leader 1991 Hindu Writers 1991 The 37th Commonwealth Parliamentary Association Conference, New Delhi 1991 Greetings Stamps 1991 Orchids