25 Roubles Transnistrian Republican Bank

Transnistria — the narrow strip of land between the Dniester River and the Ukrainian border — has operated as an unrecognized breakaway state since declaring independence from Moldova in 1990, backed by Russian military presence and never acknowledged by any UN member. Its Republican Bank issues currency that functions domestically but holds no status in international exchange. The 25 rouble denomination sits in a coinage system that exists largely outside the scrutiny of mainstream numismatic documentation, which is why catalog references like KM#291 remain sparsely annotated even decades after issue.