c.1920 Commercial Cover Shigatse to Lhasa, single franking 1920 1/6trOlive green Shiny Enamel printing (Scott 1a) tied by Shigatse cancel (type XI, Hellrigl T36), sent via Gyantse (Type I, Hellrigl T3), Penam (Type XI, Hellrigl T35) and Pelti (Type XI, Hellrigl T35), also accompanied by Nepali pie-shaped trader's mark, Fine use (Image)