May 1918: 1 Troy Ounce Platinum (pure ingot, London mkt) = £ 20. (USD$ )
Citation: Annual report of the Director of the Mint (Fiscal Year 1918); United States Bureau of the Mint (1918) p.159
1918: Estimated global platina produced
1918: 1 Troy Ounce Silver = £ 0.214 (USD$ 1.02)
Monthly Silver in London & New York:
The value of the British Pound against the US Dollar started deteriorating in November, 1918.
Citation: Economic World, Vol. 21 (Sept. 1921) ; Arthur Richmond Marsh p.19
January - April 1920
February 1920:
December 1921:
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