India Rocket Mail: Sikkim Durbar Rocket Experiments: 1935 (Apr. 8) special printed green and orange card used for test firing vertically, bearing ”ON SIKKIM DARBAR 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.

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Type: Cover