| Diameter |
| 1672 – 1754: 21-22mm 1771 – 1807: 24mm 1821 – 1830: 21.5mm 1831 – 1859: 21.7mm 1860 – 1956: 20mm |
| Weight |
| 1672 – 1679: 6.20g 1694 – 1700: 5.40g 1717 – 1775: 5.30g 1799 – 1807: 6.60g 1821 – 1830: 4.40g 1831 – 1859: 4.67g 1860 – 1873: 2.86g 1874 – 1901: 2.50g 1902 – 1956: 2.80g |
| Composition |
| 1672 – 1859: copper 1860 – 1956: bronze |