Tibet, under Tibetan Authority, 'Ga-den' silver or billon tangka coinage, of type petals around lotus centre, Tip Arsenal mint (4) dated to period 1898-1903; Dokde mint, Lhasa, (16) dated to period 1905-1909 (8) and 1912-1925 (8) all described tangkas using Scott Seman's classification system, all (10) are variants of type Seman's D, E (illustrated) and F (cf.KM.Y13 - 13.7). Mostly fine - extremely fine, in 2x2 holders fully described. (20)