1871: 1 Troy Oz. Silver (pure, retail?) ~ £ 0.37 (USD$ 2.05)
Where catalogue prices show stable pricing 1865-71, retail Platinum prices were probably likewise. Casella's Platinum capsules were otherwise known as "covers," priced by size elsewhere, as in Griffin's 1866 Catalogue; see p.186. Comparison illustrates similar prices at these two vendors in different years. (Casella's Grove's Battery was 20% more expensive, however.) Variation in prices among vendors/by location was probably significant, here.
1866: 0.25" = 9 d. ; 1871: 0.25" = 15 d.
1866: 0.38" = 20 d. ; 1871: 0.38" = 21 d.1866: 0.5" = 2 s. ; 1871: 0.5" = 2 s. 6 d.
1866: 0.75" ~ 3 s. 6 d. ; 1871: 0.75" = 4 s.
1866: 1.0" ~ 5 s. ; 1871: 1.0" = 4 s.
Pure Silver was 49% higher than Spot or Market.
1871: Undetermined Platinum (mfg: Gramme Weight Set), £ 1.50 (USD$ 8.19)
1870-72: According to this estimate, 200 Troy Ounces (£ 300.) might additionally entail recycling cost two-thirds the total Platinum value (4 x £ 50. = £ 200.) with the heaviest usage.
Presumably, the scrap-value was very poor and wholesale prices were charged for 'new' or the Platinum loss was very great.
1872: 1 Troy Oz. Platinum (Mfg., Whols.?) = £ 1.60 ($ 7.80 ; USD$ 8.94)
1871: 1 Troy Oz. Platinum (Mfg., Whols.?) = £ 1.60 ($ 7.80 ; USD$ 8.74)
1872: 1 Troy Oz. Platinum (Mfg., Whols.?) = £ 1.60 ($ 7.80 ; USD$ 8.72)
c.1871:
1872: 1 Troy Oz. Silver (Mfg., 2nd Hand) = £ 0.3313
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