1934-35, Sikkim Rocket Experiment, group of three rocketgrams incl. 1935 (Sep 27) with violet “PARCEL” label and 9p tied by Gangtok cds, 1935 (Oct 1) wuth dark blue label and 9p tied by Gangtok cds, and 1935 (Oct 4) with red label tied by 2-line cachet (faults), all signed Stephen Smith