Sheet 71L Tingri Dzong GSGS 4688 First Edition 1953. First Edition-GSGS 1932. Published WO 1953. Surveyed 1921, 1924-26. Reproduced from SI First Edition 1932 by WO 1953. 1,000/7/53 S.P.C.,R.E. Alignment of Nepal-Tibet boundary pointed out on the ground by Nepalese local officials.