The Constantine ruble is a rare silver coin of the Russian Empire bearing the profile of Constantine, the brother of emperors Alexander I and Nicholas I.
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Bychkov's proofs, according to Valentin Yanin, were genuine work-in-progress samples retained by Cancrin.
Constantine | Constantine the Great | Russian ruble | Grand Duke Constantine Pavlovich of Russia | Constantine, Algeria | Larry Constantine | Constantine VII | Constantine I of Greece | Constantine II (emperor) | Constantine II | Susannah Constantine | Learie Constantine | Constantine II of Greece | Michael Constantine | Constantine P. Cavafy | Constantine, Michigan | Soviet ruble | Niš Constantine the Great Airport | Eddie Constantine | Constantine VIII | Constantine V | Constantine Scollen | John Constantine | Constantine Phipps, 2nd Baron Mulgrave | Siege of Constantine | Ruble | ruble | Constantine the African | Constantine Samuel Rafinesque | Constantine Phipps, 1st Marquess of Normanby |