cover Selection of covers with 1912-50 1/6t. green tied by Shigatse cancel on envelope to Lhasa, 1933-60 registered covers bearing 1t. orange pair and 4t. green tied by Lhasa c.d.s., one with scarce violet registered h.s. on face, 1945 1/3t. and 2/3t. Official stamps tied by Lhasa c.d.s.