1935 (7 Apr) Silver Jubilee 3sh Rocketgram card, with special red overprint, signed and dated by Stephen Smith on back, rare (Cat No. 2C1) (Image)

Est.US$500

1935 Silver Jubilee 3sh green, imperforate gutter sheetlet of three, overprinted "Rocket Mail Experiment by Sanction Sikkim Durbar", unused without gum as issued, signed "Complete Sheet Stephen Smith", v.f. (Cat No. 4A1a) (Image)

Est.US$500

1935 Silver Jubilee 3sh red, imperforate gutter sheetlet of three, overprinted "Rocket Mail Experiment by Sanction Sikkim Durbar", unused without gum as issued, signed "Complete Sheet Stephen Smith", v.f. (Cat No. 5A1a) (Image)

Est.US$500

1935 Silver Jubilee 3sh blue, imperforate gutter sheetlet of three, overprinted "Rocket Mail Experiment by Sanction Sikkim Durbar", unused without gum as issued, signed "Complete Sheet Stephen Smith", v.f. (Cat No. 7A1a) (Image)

Est.US$500

1935 (10 Apr) Rocket Mail Experiment cover, with special red Silver Jubilee label and cancels, from Surumsa to Ray, signed Stephen Smith, rare (Cat No. 7C1) (Image)

Est.US$500

1935 (13 Apr) Rocket Mail Experiment cover with special Silver Jubilee orange & blue label and cancels, overprinted "By Sanction Sikkim Durbar", also "over River Singtam", signed Stephen Smith, rare (Cat No. 9C1) (Image)

Est.US$500

1935 (13 Apr) Rocket Mail Experiment cover with special Silver Jubilee orange & blue label and cancels, overprinted "By Sanction Sikkim Durbar", also "over River Rungpo", signed Stephen Smith, rare (Cat No. 9C1) (Image)

Est.US$500

1936 (3 Oct) 2rs dark, imperforate single used in combination with 9pi George V on Sikkim Rocketgram, handstamped "Sir Tashi Namgyal Field To, British Residency", signed Stephen Smith on both sides, with contents of the rocket on back, fine (Cat No. 14C1) (Image)

Est.US$250

1936 (3 Oct) 2rs dark, imperforate single overprinted PARCEL and used in combination with 9pi George V on Sikkim Rocketgram, handstamped "Sir Tashi Namgyal Field To, British Residency", signed Stephen Smith on both sides, with contents of the rocket on back, fine (Cat No. 15C1) (Image)

Est.US$250