| SPECIFICATIONS | |
| Denomination | One Rupee |
| Alloy | Stainless Steel |
| Diameter | 20.0 mm |
| Thickness | 1.7 mm |
| Weight | 3.93 gms |
| Shape | Round |
| Edge | Milled + plain edge |
| DieAxis | 0° |
| Mint | Kremnica |
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| KM #136.? | ||||||||||||||||||||||
Obverse : The Armorial Ensign of Sri Lanka within circle of dashes along periphery with raised rim.
Reverse : A traditional Sinhala design using the Pineapple motif. Value in big
රුපියලයි in Sinhala,
and smaller
ஒரு ரூபாய் in Thamil,
and ONE RUPEE
below and year of issue at the bottom,
with traditional Sinhala Liyavela art on either side, and country name
ශ්රී ලංකා (Sri Lanka) in Sinhala, centered on top. All within circle of dashes along periphery with raised rim.
| Year | Issue |
| 2016 | 75,000,000 |
In 2016 dated coins were put in packs of 100 coins
each and 10 were included in the larger pack for simpler distribution.
Printed in Black on the small polythene pack was
1 Rupee - 100 Pieces in 2 lines.
Weighing each of the 100 coins on a digital pocket scale with a
precision of 0.01 grams, I found that the coins weighed between 3.84
amd 3.94 with a mean of 3.90 grams. The distribution had a rms
dispersion of 0.016 (0.40% of mean weight). It had a slight negative skewness
of 0.084 and was leptokuratic with an positive excess kurtosis of
1.84. i.e. distribution more peaked than normal.
The CBSL press release stated All other specifications including dimensions and designs of the above said coins remain same. However the coins are 0.25 grams or 6.8% heavier.
The thickness of the Rs 1 coin varies as expected from 1.62 mm for 3.84 gram to 1.69 mm for 3.94 gram coin which are the extremes with 1.67 mm for average 3.90 gram coins.
The coin pack was obtained from CBSL on 2017 March 20th.
Mint, Mintage and average weight from from CBSL RTI 0006/17
The coin was scaned at 600 dpi and the images are displayed at
300 dpi.