Today Gwalior is a major city in central India, situated 300km south of the capital Delhi. Before 1947 Gwalior was a princely state. It was ruled by the Scindia family until India became independent from the United Kingdom in 1947. It then merged with several other princely states to become the Indian state of Bharat.
Gwalior and the other convention states (Chamba, Faridkot, Jhind, Nabha and Patiala) used the stamps of British India overprinted with the name of the state, e.g. Gwalior. Such stamps were issued from 1885 until 1942. After 1951, the stamps of the Convention States became invalid when they were replaced by the stamps of the independent Republic of India.
1902
Indian Postage Stamp, King Edward VII Series (Overprinted Gwalior in Indian language)
SG # O32
Used (Hinged)
1913
King George V Series (Overprinted Gwalior in Indian language at top and bottom)
SG # O51
Used (Hinged)
1940-1942
King George VI Series (Overprinted Gwalior in Indian language)
SG # O81
Used (Hinged)
SG # O82
Unused (Hinged)