India: Airmails: Rocket Mail: Sikkim Durbar Rocket Experiments: 1935 (Apr. 8) special printed blue-green card fired from Tashi Namgyal Field to the Post Office, bearing ''ON SIKKIM DARBAR SERVICE'' and ''TASHINAMGYAL/FIELD 8/4/35'' cachets, slight crease, 410 flown, signed by Stephen H. Smith and with facsimile printed signature of Tashi Namgyal, King of Sikkim. Photo.
