Russia, 1892

1892: 1 Troy Oz. platina (Ural Contract: 83% ore) =13.29 руб
1892: 1 Troy Oz. Pt (Contract @ .999) =16.01 руб
1892: Russian Refiner's Cost @210 руб/Poud = 0.3987 руб 
1892: 1 Troy Oz. Platinum (SPb: Refined Poud) =16.413 руб
 
Citation: The Mineral Industry, Vol. 7 (1899) p.570


1892: 1 Troy Oz. platina (Russia, export: crude ingot?) ~ USD$ 3.80

(US govt estimate, from Silver Rouble, @$0.10)
Citation: Monthly Summary of Commerce and Finance of the United States (1899) p. 2587