The 50th anniversary of the 1st aerial post in India was commemorated with a set 3 stamps on 18th February, 1961. A special commemorative flight was arranged over the original route. Special covers for this were issued and mail carried on the special flight received a circular handstamp and were backstamped at Naini.
5p stamp shows the First Aerial Post cancellation, 15p Air India Boeing 707 and Humber Sommer Biplane,
Re.1 H.Pequet flying Humber Sommer plane and "Äerial Post" cancellation.