UK, 1862/1864: Platinum Still

1862: 1 Troy Ounce Platinum (refined, retail) = £ 1.20 (USD$ 6.67)

1862: 1 Troy Ounce Platinum (refined, wholesale?) = £ 1.18 (USD$ 6.57)

1862: 1 Troy Oz. Platinum (refined,whols.) = £ 1.35 - 1.50 (USD$ 7.51 - 8.34)

Boiler: £ 1,500. (1,250 ounces, troy?)

Boiler: £ 350. (291.7 ounces, troy?)

Boiler: £ 120. (100 ounces, troy?)

Citation: Handbook to the industrial department of the International exhibition, 1862, By Robert Hunt (186?) p.22

1862, 1864:

1864:

1868: