India Post has issued several stamps on different occasions. These stamps have their own First Day Cancellations. It is found that these cancellations have different variations of Colors, Size, Place, etc. The collectors with creativity have made covers with combination of such variety cancellations on respective dates. Such covers show the creative efforts of the philatelists.

For the North-eastern sector of India, including the states of Bihar, West Bengal and Sikkim, a second base office was set up called, 2 Central Base Post Office or 99 APO, at Calcutta.