100 Roubles

The 100-rouble denomination in bimetallic form was a direct consequence of the hyperinflation that consumed the post-Soviet Russian economy in 1992, the year the government liberalized prices under Yegor Gaidar's shock therapy program. Inflation that year exceeded 2,500%, rendering lower-denomination coins obsolete within months of striking. The bimetallic construction was borrowed from Italian lira technology — the same approach used for the 500-lire coin — selected largely for its resistance to counterfeiting at a moment when monetary confidence had essentially collapsed.