90 Roubles Irkutsk

The 90-rouble denomination is the anomaly that stops collectors cold. No standard monetary logic explains it — the figure derives from the exchange rate used to convert existing Siberian scrip obligations into ruble-denominated paper, producing a denomination that appears nowhere else in Russian monetary history. Irkutsk's regional government issued these notes during the chaotic interval between the February Revolution and the consolidation of Soviet authority in Siberia, when local administrations were scrambling to maintain any functional currency at all.

The American Bank Note Company contract is the one detail that grounds this note firmly. ABNC had deep pre-existing relationships with Russian financial institutions, and the Irkutsk order was placed through those established channels — New York printing a Siberian emergency note while both empires were simultaneously at war.