A)Dated 16th December, 1934, stamped Semaphore Station, Saugor Island - Park Street, Calcutta. B)Rocket No. 83, dated 27th September, 1935. Second series of Severn rocket experiments works conducted in Sikkim state from 27th September - 4th October, 1935. C)Rocket No. 84, dated 28th September, 1935. The second experiment of the second series from the compound of Gangtok Telegraph Office. D)Rocket No. 86, dated 29th September, 1935. Franked by the special two rupee rocket stamp in purple which was tied to the missive by two cachets DES-PATCHED BY H.H. THE MAHARAJAH. E)Rocket No. 88, dated 1st October, 1935. Special two rupee purple rocket stamp was overprinted PARCEL in red. postmarked GANGTOK 1 OCT.35. F)Rocket No. 89, dated 4th October, 1935. Franked with special two rupee rocket stamp which is tied to the missive by a two line cachet reading :- ROCKET MAIL PRINCESS PEMTSIDON. Oct.4th. 1935. G)Dated 11th October, 1937. Alipore. Carried by the “Boomerang” The world’s first Boomerang Rocket Flight.