Based in the United Kingdom, the India Study Circle (ISC), they have produced an unbroken series of journals on Indian philately since 1951.‘India Post’ is now widely regarded as the most eminent, single source of information on the stamps and postal history of India over the last 250 years.

The aims of the India Study Circle are to research and study postage stamps, postal stationery, postal history and fiscal and revenue stamps of India, Pakistan, Bangladesh and the Indian States, including Indian postal services used outside the sub-continent.

Details
YouTube