1721 Polushka — Russian Empire (1718–1722)
1 polushka = ¼ kopecks
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- Period
- Peter I
- Currency
- 1 ruble = 100 kopecks
- Issue type
- Circulation
- Distinguishing feature
- Year in Arabic numerals
- Mint mark
- Kadashevsky Mint
- Metal
- Copper
- Diameter
- 14.0 mm
- Thickness
- 0.9 mm
- Weight
- 1.02 g
- Shape
- Round
- Orientation
- Medal (↑↑)
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