USA, 1870s

1866/7?: 1 Troy Ounce of platina = $  4.28  (USD$  6.03)

1867: 1 Troy Ounce platina = USD$ 4.40  (USD$  6.56)

1870: 1 Troy Ounce platina (unmanufactured) = USD$ 4.67 (USD$ 5.36)
c.1871: 1 Troy Ounce of platina = $  5. 5


c.1870: 1 Troy Oz. Platinum (refined, imported price, retail) = USD$ 5.50 - 15. 
c.1871?: 1 Troy Ounce of Platinum = $  6. 

c.1873: 1 Troy Ounce of Platinum = $ 7.90 

1875: 1 Troy Ounce of Platinum = $ 8.39

c.1870s - 80s: 1 Troy Ounce of Platinum = $  7. - 7.50