Tibet, under Tibetan Authority, 'Ga-den' silver or billon tangka coinage, of type petals around lotus centre, Dodpal mint (Lhasa), a selection of extensively described tangkas using Scott Seman's classification system, all dated to period, 1870-1875 (14, one illustrated), all (10) are variants of (KM.Y13.B with varieties); a similar group from Yip Arsenal mint (7, one illustrated), (KM.Y13C - 13D). Mostly fine - good very fine, in 2x2 holders fully described. (16)