Russia, 1877

1877: 1 Troy Oz., Platinum (Paris: Refined, Mkt.) = 11.57 руб Kr. (Fr 31.73)
1877: 1 Ozt. Platinum (London: Semi-Mfg, Trade-Ret.) = 15.23 руб Kr. (£ 1.65)
1877: 1 Ozt. Platinum (SF: Refined) ~19.37 - 22.13 руб Kr. (USD$ 12.)

Assuming the Zolotnik rate (corrected: per 4.266 Grams) and purchased in late 1876,
 
1876: 1 Troy Ounce Platinum (SPb: Imported, Mfg) = 17. руб Kr. (£ 2.00)
1877: 1 Ozt. Platinum (SPb: Imported, Mfg) ~ 16.5 - 19. руб Kr. (£ 2.00)

Citation: The Chemical News and Journal of Industrial Science; Vol 35 No. 901 (1877) p.88


The German Mark was conveniently assumed to be equal to 1 English Shilling, therefore:

1877: 1 Kilogram platina (Russia: 74.8% ore) ~ руб 95.71 (95.71 / 84. - 112. руб)

1877: 1 Ozt. platina (Ru: Contract 74.8% ore) ~  руб Kr. 2.613 - 3.503
1877: 1 Ozt. Pt (Ru: Intrinsic) ~ руб Kr. 3.493 - 4.683
1877: 1 Ozt. Platinum (UK: Semi-Mfg, Trade) = руб Kr. 13.20 - 17.70 (£ 1.65) 
 
In 1867-77, the firm of Johnson Matthey & Co. paid ℳ 210/kg. for the unprocessed ore, and after 1877, ℳ 315/kg.  In 1895/6,  ℳ958/kg.




1877: Pt Yield = 105.407 Poud = 4,216.3 Funt = 55,512 Ozt.= 1,726.62 Kgs.