UK, 1888: Platinum

1888: 1 Troy Ounce Platinum (semi-mfg, imported) = USD$ 7.65
1888: 1 Troy Oz. Platinum (Mfg, whols.) = £ 2.70 - 2.80

1888: 1 Troy Oz. Platinum (Mfg, whols.) = £ 3.15   

Large Producer:
1888: 1 Troy Oz. Platinum (Semi-mfg, JM trade) ~ £ 1.37 (USD$ 6.69)
1888: 1 Troy Oz. Platinum (Semi-mfg, JM trade) = £ 1.40 (USD$ 6.22)

Small Producer:
1888: 1 Troy Oz. platina (London, Ret.) =  £ 2. - 2.08 (USD$ 9.72 - 10.11)
  
1889: 1 Troy Oz. platina (London, bulk) ~ £ 2.21 (USD$ 10.77)


Given the discrepancy between 1888 and 1889 prices, and estimated 600 Ozt Manufactured Platinum was shipped to the USA from the UK. 

1888: 1 Troy Oz.Platinum (Export to USA: Semi-mfg.) = £ 1.40 (USD$ 6.67)
1888: 1 Troy Oz. Platinum (Export to USA: Mfg.) = £ 3.533 (USD$ 15.70) 

1889: 1 Troy Oz. Platinum (Export to USA: Semi-mfg.) = £ 1.50 (USD$ 6.67)



 

"About twenty years ago {circa 1887} three-rouble pieces could be purchased at most of the money-changers in London for about a quarter {~£ 2.25/Ozt, Ret.: Per Coin, £ 0.67 Whols., £ 0.75 Ret.} of the recent extraordinarily high value of the metal {Oct. 1906: £ 7.98, Whols., £ 9., Ret.}"

An 1836 EF 12-Rouble coin sold for £ 4.65; where a full-weight 12-Rouble was 1.3292 ozt. (638 Grains Troy) and sold about +150% the Market Price for Pt (assumed, £ 1.40):

1888: 1 Troy Oz. Platinum (Coin: Numismatic) = £ 3.50 (USD$ 17.) 


Citation: American Journal of Numismatics, Volumes 40-42 Sept 1907


Bonhams (12/8/2010: Lot 1030) sold Proof for US$ 95,940, Pt @ USD 1683.


Iridium-tipped pen, £ 0.1250; Gold Iridium-tipped pen, £ 0.25



Grove's Battery: Per Element, 1 Platinum Foil ~6.5in x 9.5in = 55.25 Sq.In; 
~1.357 g. Platinum