Platinum Refining Cost

1800:
1803: 1 Troy Oz. Pt (French Refiner Cost) = Fr. 24.38 (£ 1.01, USD$ 4.50)
1804: 1 Troy Oz. Pt (British Refiner Cost) = £ 0.4452 (Fr. 10.92, $ 2.26) 
1806: 1 Troy Oz. Pt (British Refiner Cost) = £ 0.1333 (Fr. 3.17, $ 0.894) 
1809: 1 Troy Oz. Pt (French Refiner Cost) ~ Fr. 4.24 ($ 0.8472; £ 0.1696-0.2065)
1814: 1 Troy Oz. Platinum (Phila. USA Refiner Cost) = $0.4405 (Fr. 2.23; £ 0.0848)
1817: 1 Troy Oz. Pt (UK Refining Cost 1814-20)  = £ 0.1000 (Fr. 2.34 - 2.47)
1820: 1 Troy Oz. Pt (UK Refining Cost c.1820)  = £ 0.0875 (Fr. 2.15, USD$ 0.39)
1827: 1 Troy Oz. Pt (est. Colombia Refining Cost) = S$ 0.4056
1827: 1 Troy Oz. Pt (est. Russian Refining) ~0.47 руб; Fr. 1.87; £ 0.073; USD$ 0.3531
1828: 1  Troy Oz. Pt (French Refiner: Sponge, Commercial) < Fr. 4.40 (USD$ 0.8656)
1829: 1 Troy Oz. Pt (Russian Mint Cost) = 0.8178 руб. (£ 0.1277, Fr 3.345, USD$ 0.613)
1830: 1 Troy Oz. Pt (UK Refining Cost c.1820)  = £ 0.0875 (Fr. 2.15, USD$ 0.39)
1833: 1 Troy Oz. Pt (Russian Refiner Cost) = 2.20 руб (Paper)
1834: 1 Troy Oz. Pt (Russian Refiner Cost) = 1.6043 руб (Fr. 1.804; USD$ 0.3537)
1839: 1 Troy Oz. Pt (Ru Refiner Cost)  ~0.7912 руб Silver = Fr. 0.933 ; £ 0.0378
1845:
1850:
1855:
1860:
1865:
1870: 1 Troy Oz. Platinum (US Refiner Cost) = $ (USD$ 0.80)
1875:
1880: 1 Troy Oz. Platinum (US Refiner Cost) = $ USD$ 0.49
1885:
1890: 1 Troy Oz. Platinum (UK Refiner Cost) = £ 0.0625 - 0.1250 (USD$ 0.30 - 0.61)
1893: 1 Troy Oz. Platinum (NY USA Refiner Cost) = USD$ 0.39
1895: 1 Troy Oz. Pt (Ru Refiner Cost) = 1.92-2.64 руб (Fr. 0.71-0.97; USD$ 0.14-0.19)
1898: 1 Troy Oz. Pt (Ru Refiner's Cost) = 0.3798 руб (Fr. 1.02, £ 0.04, USD$ 0.1963)
1899: 1 Troy Oz. Pt (German Refiner Cost) = ℳ 1.244 (USD$ 0.30, Fr 1.52, £ 0.0483)
1905:
1907: 1 Troy Oz. Platinum (UK Refiner Cost) = £0.075