1 Kuruş Neptun

The "Neptun" series, launched by the Darphane in the early 2020s, was designed explicitly for the collector market rather than circulation — aluminium strikes sold in themed sets, with each denomination assigned a name from classical mythology. The choice of Neptune for this denomination follows no particular numismatic precedent; it was a branding decision by the mint's marketing division as Turkey expanded its bullion and collector coin program during a period of significant lira depreciation.