A Special cover with Special cancellation on “Tin Can Mail Experiment”. GOAPEX 2021.
The following was released on occasion.
1. Permanent Pictorial Cancellation on Fort Aguada,
2. A Special Ferry carried cover with Special cancellation.
3. Presentation pack & Postcards on Butterfly & Moth Diversity of Goa with Special cancellation,
4. A Special cover with Special cancellation on “Tin Can Mail Experiment”.
In the early part of the 20th century, philatelists began seeking out postal cancellations from Niuafo'ou, a volcanic Tongan island. Since Niuafo'ou lacked a deep water harbor to accommodate ships, postal deliveries were received via the so-called "Tin Can Mail" system of having mail thrown overboard in biscuit tins and retrieved by local swimmers. To swim mail out, Tongans adopted the traditional fishing technique of using a buoyancy pole, called a fau, to swim out with a biscuit or kerosene tin to visiting ships. Using the pole for support the swim could take several hours.
Goa Philatelic and numismatic society, Goa being the proponent. Tin Can Mail Experiment was carried out with the assistance of the River Navigation Department of Goa.