1 Lira Potato Plant

San Marino's annual coinage program has long issued thematic series, and the 1992 set focused on local agriculture — a deliberate nod to the microstate's rural roots at a time when it was rapidly expanding its financial and tourist sectors. The potato plant issue is part of that series.

KM#278 is one of the lower-mintage pieces from this run, produced in quantities calibrated to collector demand rather than circulation need. San Marino lira coinage was legal tender alongside Italian lira under the bilateral treaties governing the two states' monetary arrangements, though virtually none of it ever traded hands in a shop.