France, 1912

1912: 1 Troy Ounce platina (Ore, 80%) ~Fr 186.62 (ℳ 149.30)
1912: 1 Troy Oz. Platinum (Mkt) ~Fr 233.27 (ℳ 186.62)
 
1912: 1 Troy Oz Gold (Mkt) = ℳ 87.09
 
In 1912, the price for 1 g of platinum was  approximately Fr. 7.50. Considering further that the crude platina, which is obtained in the {residue?}, only contains approximately 80% pure platinum, so 1 g of crude platina has a value of .80 x Fr. 7.50. = Fr. 6, or ℳ 4.80, while the value for 1 gram Gold only amounts to ℳ 2.80.


Citation: Die Lagerstätten der nutzbaren Mineralien und Gesteine nach Form..., Vol. 2; Franz Beyschlag, Paul Krusch (1913) p.702

Russia: 1912

In the Age of the Telegraph, the correspondence of Platinum prices on various markets was probably consistent:

October 24, 1912
 

December 12, 1912
  

UK, 1912

1912: 1 Troy Ounce Platinum (London) = £ 9.50

Citation: The Platinum Metals ; Arthur Douglas Lumb (1921) p.16



Wartime price controls in effect.

UK, 1910 -1924: Osmium in Tasmania

1910- 1924: Iridosmine (Osmium-Iridium) in Tasmania, Australia

Assay, c.1913:

1912:
 


June 1910: 1 Troy Oz. Osmiridium (Tasmania) = £ 4.417

March-June, 1910:



See also: Official Year Book of the Commonwealth of Australia, Issue 27; Issue 1934 p.451

1910: 1 Troy Oz. Osmiridium (Tasmania) = £ 4.33

1911: 1 Troy Oz. Osmiridium (Tasmania) = £ 4.384
1911: 1 Troy Oz. Osmiridium (High, Mkt) = £ 7.50

1912: 1 Troy Oz. Osmiridium (Mkt) = £ 7.371

1913: 1 Troy Oz. Osmiridium (Mkt) = £ 9.53
1914: 1 Troy Oz. Osmiridium (Tasmania) = £ 5.675
1914: 1 Troy Oz. Osmiridium (Mkt) = £ 9.89
1915: 1 Troy Oz. Osmiridium (Tasmania) = £ 6.40

1916: 1 Troy Oz. Osmiridium (Tasmania) = £ 8.55
1917: 1 Troy Oz. Osmiridium (Tasmania) = £ 11.
1917: 1 Troy Oz. Osmiridium (Mkt) = £ 14.75
1917: 1 Troy Oz. Osmiridium (Mkt) = £ 18.50
1917: 1 Troy Oz. Osmiridium (Best Quality) = £ 22.50

1918: 1 Troy Oz. Osmiridium (Tasmania) = £ 7.90
1918: 1 Troy Oz. Osmiridium (Local High) = £ 14. - 15.
1918: 1 Troy Oz. Osmiridium (Mkt or avg?) = £ 27.90
1918: 1 Troy Oz. Osmiridium (Local High) = £ 37.25

1918: 1 Troy Oz. Osmiridium (Mkt) = £ 40.
1919: 1 Troy Oz. Osmiridium (Local High) = £ 33.

Germany, 1869: Manufactured Prices 1869-1912

The UK and German catalogue prices for 'semi-mfg' Platinum are nearly identical for 1869. But this firm's 1861 Catalogue offered imported French Platinum-ware was 13% higher.  

From an estimated Market-Price of Thaler 5.25, it would appear Platinum Scraps were sold for ~+10% and German Platinum stills sold ~+50% over the Producers' Cost. 

The Paris Price for Bulk Platinum was ℳ 395. - 404./kg. 

1869: 1 Troy Ounce Platinum (UK: semi-mfg, whols.) = £ 1.34

1867/9: 1 Ozt. Platinum (SPb semi-mfg, bulk rate) = Fr 18.97; ℳ 10.22 (Thlr. 5.21)
1869: 1 Ozt. Platinum (Paris mkt) ~ Fr 22.79 (Thlr. 6.263, ℳ 12.26)
1869: 1 Ozt. Platinum (Paris mfg, bulk rate) = Fr 23.33 (Thlr. 6.411, ℳ 12.55)

McAllister's 1869 Catalogue sold platinum at $24./oz, about 2/3rds the US Gold Rate and between 2-3x time higher than Leipzig prices shown here.

1869: 1 Ozt. platina (SPb: bulk ore, at purity?) = Thaler 2.695; ℳ 5.28 (3.04 руб)
1869: 1 Ozt. Pt (Est. SPb: Refining Cost) ~ Thaler 1.35; ℳ 2.75 (1.50 руб)

1869: 1 Ozt. Platinum (Est. SPb: First Base-Cost)  ~ Thaler 4.; ℳ 8. (4.50 руб) 
1869: 1 Ozt. Platinum  (Est. German Whols. Mkt) ~ Thaler 5.25; ℳ 10.35 (6.25 руб)
    
(After 1850, 10 Pfennig = 1 Neugroschen; 30 Neugroschen = 1 Thaler.)
 
1869:
Scrap Platinum, Retail: ℳ  458.33/kg.
Platinum Wire/Foil, Retail: ℳ  750./kg.

Assuming 'Market' ~ Scrap Rate, plus ℳ  25 for manufacture:
Platinum Mfg, Bulk: ℳ  485/kg.

Platin-Abfälle = Scrap Platinum (Retail Sell Rate) 
  5.5 Ngr * 31.1034764 Grams = 5.702304 Thaler = ℳ 14.25576 


1869: 1 Ozt. Platinum (Scraps, SOLD Ret.) = Thl 5.70 (ℳ 14.256)
.... (£ 0.86, )
1869: 1 Ozt. Platinum (Basic Mfg, Ret.) = Thl 9.85 (ℳ 24.624)
.... (£ 1.48)

1869: 1 Ozt. Platinum (Wire & Foil: Semi-Mfg) = Thl 9.33 (ℳ 24.624)
.... (£ 1.40) 
1869: 1 Ozt. Platinum (Wire &Foil: Mfg) = Thl 15.55 (ℳ 38.88)
.... (£ 2.33)
1869: 1 Ozt. Platinum (Mfg: Weights) = Thl 10.37 (ℳ 25.92)
.... (£ 1.55)

1869: 1 Ozt. Platinum (Mfg: Crucible) =  Thl 12.31 (ℳ  30.78)

1869: 1 Ozt. Platinum (Mfg: Spoon) =  Thl 12.96 (ℳ 32.40)
.... (£ 1.94)
1869: 1 Ozt. Platinum-Black (Chemical, Ret.) = Thl 15.55 (ℳ 38.88)
.... (£ 2.33)

1869: 1 Ozt. Silver (Mfg, Ret.) = Thl 4.15 (ℳ  10.37)
.... (£ 0.63)

1869: 1  Ozt. Pt Manufacture (Platinumware, Ret.) = Thl 0.52 (ℳ  1.296)
.... (£ 0.08)

Citation: Preis-Verzeichniss von Apparaten und Geräthen für alle Zweige der reinen und angewandten Chemie und Physik (1869) 



Citation: Preis-Verzeichniss von Apparaten und Geräthen für alle Zweige der reinen und angewandten Chemie und Physik (1869)

1869: 1 Ozt. Platinum (Mfg: Spatula) =  Thl 12.96 (ℳ 25.40)








c. 1869: Citing a Berlin manufacturer, so the Loth = 14.4 g.


c.1869: 1 Troy Oz. Platinum (Berlin Mfg, Ret.) =  Thl 12.96 
  
While one Loth of pure Platinum costs Thlr. 6, so one Loth Platinum-plating is only one Thlr. 1. and, for example, a 12 Zoll evaporating dish costs Thlr. 30.

Citation: Muspratt's theoretische, praktische und analytische Chemie..., Vol. 4; Sheridan Muspratt, F. Stohmann, B. Kerl (1869) p.883




Here is significant historical price summary for the German Platinum Price (in Marks) from 1869 - 1912. Robert Hasenclever's data first appeared in Die chemische industrie (1892.)  The German Mark was introduced in 1872 at 1/3rd the value of the North German Thaler, presuming these tabled price quotes (1869-72) are accurately converted.

1869: 1 Troy Oz. Platinum (German Mfg: Still, bulk) = Thlr 9.53

1869: 1 Troy Oz. Platinum (German Mfg) = Thlr 9.53
1870: 1 Troy Oz. Platinum (German Mfg) = Thlr 9.54
1871: 1 Troy Oz. Platinum (German Mfg) = Thlr 9.46
1872: 1 Troy Oz. Platinum (German Mfg) = Thlr 9.43
  1868/9: 1 Troy Oz. Platinum (UK market) = £ 1.20 (USD$ 8.20)
1868/9: 1 Troy Oz. Platinum (Russian Ingot @ Paris) = £ 0.7484 (USD$ 4.85)

1868: 1 Troy Oz. Platinum (Refined, Market) = ℳ 17.885 (£ 1.33)
1869: 1 Troy Oz. Platinum (Mkt: Est. ℳ 575/kg) = ℳ 17.885 (USD$ 5.91)
 
1869: 1 Troy Oz. Platinum (Mfg: Bulk, Still) = ℳ 18.6621 ($ 6.165; USD$ 8.20) Citation: Die Chemische Industrie, 1892 Vol. 15 (1892) p.70

Reprinted many places.

Citation: The Manufacture of Sulphuric Acid and Alkali: Sulphuric acid (Vol. 1, Pt. 3, 4th Ed.) ; Georg Lunge (1913) p.1153

Citation: Handbuch der chemischen Technologie: Neue Folge, Vol. 12;  Georges Lunge et al. (1903) p.785

USA, 1900s: PGMs

1897: 1 Troy Ounce of Platinum (US, refined, whols.) = $ 15. - 16.

1907?: 1 Troy Ounce of Platinum (US, refined, whols.) = $ 38.

1910: 1 Troy Ounce of Platinum (US, refined, whols.) = $ 34.

1912:

USA, 1912: Ingot & Crucible Prices, Compared

1912: 1 Troy Ounce platina (Urals, source, 83% ore) ~ USD$ 37.05
1912: 1 Troy Oz. platina (SPb, export, 83% ore) ~ USD$ 37.08
1912: 1 Troy Oz. platina (Colombian import, ore) = USD$ 33.07

1912: 1 Troy Ounce Platinum (NY mkt: refined ingot) = USD$ 45.55
1912: 1 Troy Oz. platina (US ore, ~50%) ~ USD$ 21.
1912: 1 Troy Oz. platina (US ore, at purity) = USD$ 41.-42.
1912: 1 Troy Oz. Platinum (Total First Base expense) ~ USD$ 4.50

1912: NY Monthly Mkt Prices for Refined Ingot

1912: Russian Ingot at St. Petersburg and New York, for comparison.



Colombian imported platina, at the intrinsic rate

Citation: The Jewelers' Circular, Vol. 85, Issue 2 (11/1/1922) p.77




US platina sold at intrinsic rate, 

Citation: Minerals Yearbook 1913 p.447


Platinum in jewelry cost more, for the Iridium

 

January, 1912:  Iridium @ $63.


Professor Keller's lecture was delivered in early April, 1912. Ingot Platinum was quoted at this rate March-December. Bishop's correspondence probably includes (January-) March prices.

March, 1912: 1 Troy Ounce Platinum (NY mkt: ingot, 85%) = USD$ 45.50

c. February, 1912: 1 Troy Oz. Platinum (refined, producer) = USD$ 46.65
c. February, 1912: 1 Troy Oz. Platinum (semi-mfg, producer) = USD$ 48.21
c. February, 1912: 1 Troy Oz. Platinum (mfg, producer) = USD$ 52.875

October, 1912: 1 Troy Oz. Platinum (NY mkt: refined ingot) = USD$ 45.50
October, 1912: 1 Troy Oz. Iridium (NY mkt: refined ingot) = USD$ 68. - 70.
  Citation: Engineering and Mining Journal, Vol. 94 (Nov. 12, 1912) p.873
 

October 1912:



Oct/Nov, 1912: 1 Troy Oz. Platinum (NY mkt: refined ingot) = USD$ 45.50
Oct/Nov, 1912: 1 Troy Oz. Platinum (NY: ~4% Ir) = USD$ 48.


Citation: Engineering and Mining Journal, Vol. 94 (1912) p.913

USA, 1910-15: New York Spot

Various: (1828 price)

1910 - 15:

Citation: Mines register: successor to the Mines handbook and the Copper ..., Vol. 14 ( ) p.57