20 Sen Pattern

Descrizione del dritto	The obverse features the Imperial chrysanthemum mon (sixteen-petalled chrysanthemum seal) positioned at the upper center of the field, serving as the imperial emblem of Japan. Beneath the mon, the denomination is rendered vertically in three large Japanese kanji characters reading '二十錢' (Twenty Sen), occupying the central axis of the coin. The field is otherwise plain and unadorned, with no surrounding legend. The coin is bordered by a distinctive milled inner ring of fine dentils encircling the entire design.
Scrittura del dritto	Accedi per vedere i dettagli
Legenda del dritto	Accedi per vedere i dettagli
Descrizione del rovescio	Accedi per vedere i dettagli
Scrittura del rovescio	Accedi per vedere i dettagli
Legenda del rovescio	Accedi per vedere i dettagli
Bordo	Reeded
Zecca	Accedi per vedere i dettagli
Tiratura	Accedi per vedere i dettagli
Informazioni aggiuntive	Pattern coinage from Meiji-era Japan occupies an unusually well-documented corner of numismatics, largely because the mint at Osaka kept meticulous records of experimental strikes. This piece likely dates to the transitional period when Japan was actively retooling its coinage system under Western advisors, testing alloy compositions before committing to production specifications. The billon formula here — with nickel added to the silver-copper mix — suggests a cost-reduction trial, not a metallurgical accident. No 20 sen denomination in this composition ever entered circulation.