100 Shillings Black Rhinoceros

Tanzania's rhinoceros coinage sits in a crowded field of African wildlife issues produced for the collector market rather than circulation — the Bank of Tanzania has authorized numerous such pieces through European minting intermediaries, primarily targeting European and North American buyers. The black rhinoceros (*Diceros bicornis*) itself was listed as critically endangered by the IUCN, with the western black rhino subspecies declared extinct in 2011, lending these issues a conservation framing that drives their commercial appeal.

KM#89 is silver-plated copper-nickel, not solid silver — a distinction that meaningfully affects secondary market value relative to superficially similar issues in the series struck in .999 fine.