Unused on cover / entire letter 1933 Everest Expedition envelope (flap torn) to Gibraltar and redirected to the U.K., with India 2a.6p. tied by "GANGTOK" segmented c.d.s. and showing adjacent a fine strike of the rare "EVEREST EXPEDITION/1933/BASE CAMP" circular cachet in violet; minor perimeter faults and flap torn but still fine and rare. Photo