10 Euro Rooster

San Marino's coinage program has long relied on annual thematic issues to maintain collector interest, the microstate having no meaningful domestic circulation economy of its own. The rooster theme likely ties to the Chinese zodiac Year of the Snake... but that's 2025, not the rooster's year — which was 2017. Without confirmed documentation on what specifically prompted this issue, the thematic rationale here is unclear.

San Marino issues collector coins almost exclusively for the numismatic market — the republic's tiny population and eurozone membership mean domestic circulation is essentially nonexistent. KM#645 is among the more recent entries in a decades-long program of annual themed issues that the San Marino mint has used to sustain collector revenue since the country adopted the euro in 2002.