INDIA 1935,  Airmails: Rocket Mail: Sikkim Durbar Rocket Experiments: 1935 (Apr. 8) special printed green and orange card used for test firing vertically, bearing ''ON SIKKIM DURBAR SERVICE'' and ''TASHINAMGYAL/FIELD 8/4/35'' cachets, fine, 388 flown, signed by Stephen H. Smith and with facsimile printed signature of Tashi Namgyal, King of Sikkim. Photo..