Coin Pure Gold Weight (t/oz) Fineness Weight (g) Years Minted
Russian 5 Roubles 0.1244 0.900 4.3013g Minted: 1897 – 1911*

*Earlier editions have different pure gold weights. For example coins minted between

1886 – 1896 are 0.1867 t/oz and weigh 6.4516g.
Russian 10 Roubles 0.2489 0.900 8.6026g Minted: 1898 – 1911* and again from 1923, 1975 – 1982 as the Chervonetz (CCCP)

*Earlier editions of the Imperial coins have different pure gold weights.

For example coins minted between

1886 – 1897 are 0.3734 t/oz and weigh 12.9039g.
Russian 15 Roubles 0.3734 0.900 12.9039g Minted: 1897*

*Other varieties do exist.