1 Rupee non-magnetic

Sri Lanka's copper-nickel rupee was issued beginning in 1972, the year the country formally became a republic and severed its remaining constitutional ties to the British Crown — the name change from Ceylon making this the first rupee coinage struck under the Sri Lanka identity. A magnetic steel version was later introduced as a cost-cutting measure, which is what gives the non-magnetic designation its meaning: not a variety in the collector sense, but a production-era distinction with a hard cutoff.