France, 1852? : Paris Catalogue Prices (Breton)

Germany:
1852: 1 Troy Ounce Platinum (German semi-mfg, retail) ~ Fr. 46.82
1852: 1 Troy Oz. Ag (Coined, ~9 Roubles, Ag) ~Fr. 35.52

1852: 1 Troy Oz. Ag (Coined, ~3 3-Rouble Coins) ~Fr. 35.50
1852: 1 Troy Oz. Platinum (German Scrap Rate) ~Fr. 16.52
1852: 1 Troy Oz. Platinum (Coin, German Numismatic Rate?) ~Fr. 22.77


1853: 1 Troy Oz. Platinum (mfg, retail)  = Fr 46.65 (USD $ 9.14)

Citation: Catalogue et prix des instruments de physique, de chimie, d'optique, de ... Breton Freres, 1852?, p 24

1859: 1 Troy Oz. Platinum (mfg, whols.)  = Fr  31.10 - 38.88 (USD$ 5.98 - 7.47)

Very dubious generic price reference. It's entirely unclear when Russia was producing 122 pouds (2,000 kg?!) per year, after 1825.  

This type of reference (widely republished, for the masses) is unreliable.

c.1854?
Citation: Dictionnaire universel des sciences, des lettres et des arts, Vol. 2, Marie Nicolas Bouillet (1855) p.1302


c.1852? Platinum Bichloride 1/3rd the price of Gold Bichloride