This was the first firing of rocket mail over a river (from Surumsa to Ray). The flight is identified by the markings and the red commemorative label.

This is an unused label from the world's first rocket parcel experiment. Signed by Smith. Note the number 26

Later on the same day Smith arranged for a rocket to fire mail from Ray to Surumsa. Note the different coloured label.

First rocket flight of the day - over the Singtam river.

Last rocket mail flight in Sikkim. Carried over the Rungpo river.