UK, 1873-85: Platinum Price Estimated to Silver

Citation: Extract from The new Werner twentieth century edition of the Encyclopaedia Britannica, Volume 19, 1907, p.

Where the market price of silver is known, the London price of platina may be hypothesized, thus:

1874: London Price of Silver = £ 0.2427 ..... Price of platina, Troy Oz. ≈ £ 0.9708
1875: Price of Silver, Troy Oz. = £ 0.2370 ..... Price of platina, Troy Oz. ≈ £ 1.0072
1876: Price of Silver, Troy Oz. = £ 0.2198 ..... Price of platina, Troy Oz. ≈ £ 0.9891
1877: Price of Silver, Troy Oz. = £ 0.2286 ..... Price of platina, Troy Oz. ≈ £ 1.0861
1878: Price of Silver, Troy Oz. = £ 0.2188 ..... Price of platina, Troy Oz. ≈ £ 1.0938
1879: Price of Silver, Troy Oz. = £ 0.2135 ..... Price of platina, Troy Oz. ≈ £ 1.1745
1880: Price of Silver, Troy Oz. = £ 0.2177 ..... Price of platina, Troy Oz. ≈ £ 1.3063
1881: Price of Silver, Troy Oz. = £ 0.2156 ..... Price of platina, Troy Oz. ≈ £ 1.4016
1882: Price of Silver, Troy Oz. = £ 0.2151 ..... Price of platina, Troy Oz. ≈ £ 1.5057
1883: Price of Silver, Troy Oz. = £ 0.2104 ..... Price of platina, Troy Oz. ≈ £ 1.5255
1884: Price of Silver, Troy Oz. = £ 0.2112 ..... Price of platina, Troy Oz. ≈ £ 1.6368
1885: Price of Silver, Troy Oz. = £ 0.2036 ..... Price of platina, Troy Oz. ≈ £ 1.6292

In London, Silver fell -16.1% and platina rose +67.8%.

c.1875:  1 Troy  Oz. platina  (ore)  = £  1. - 1.07 (USD$ 4.65 - 6.)