Public auction #37

1935 4th Sikkim Dubar Rocket Experiment: Cover flown with 4th rocket experiment on 9th Apr. 1935, one of 175 flown, bearing the respective vignette in green tied by special octagonal star cachet in violet, franked by KGV. 1/2a. and 3p. both tied by "GANGTOK/9 APR 35" double-ring d/s, signed by Stephen H. Smith, and on the reverse with further strike of Gangtok cds, slightly stained, good. Additionally an unused vignette in green signed Stephen H. Smith on back.