| SPECIFICATIONS | |
| Denomination | Rupees One |
| Alloy | Copper-Nickel |
| Diameter | 25.4 mm |
| Thickness | 2.0 mm |
| Weight | 7.13 gms |
| Shape | Round |
| Edge | Security edge |
| DieAxis | 0° |
| Mint | Royal,Llantrisant |
SRI LANKA - One Rupee
A definitive decimal currency one Rupee copper-nickel coin. In 1982 the Security edge was replaced with a Milled edge. In 1996 the metal changed to an Nickel plated Steel coin reflecting its diminishing value.
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| KM #136 | ||||||||||||||||||||||
Obverse : The Armorial Ensign of Sri Lanka
Reverse : The value ONE RUPEE in Sinhala, Tamil and English below and year of issue at the bottom within a circle of the traditional Sinhala Liyavela art with Sri Lanka in Sinhala on top.
| Year | Edge | Issue | Mint |
| 1972 | Security | 7,000,000 | |
| 1975 | Security | 31,500,000 | |
| 1978 | Security | 37,018,000 | |
| 1982 | Milled | 75,000,000 | |
| 1994 | Milled | 50,000,000 |
From 1996 the One Rupee was issued as a Nickel Plated Steel coin which in appearance and weight and size is identical to this Cupro-Nickel issue it replaced, except being attracted by magnets.
The coin was scaned at 600 dpi and the images are displayed at 250 dpi.