1777

DSQ
Edward Milne's 12 Silver Camp cups for Gen.Washington were fashioned from 16 Spanish Dollars weighing 13.9 Ozt. (13 Ozt 18 dwt) ; Spanish Dollar weighed 0.86875 Ozt. 

Milne credited Washington 1.75 Ozt. (1 Ozt 15 dwt) or 

August 1777: 1 Troy Ounce Silver (Spanish Coin @ Phila.) = P£ 1.0 
August 1777: 1 Troy Oz. Silver (Coin: Intrinsic @ Phila.) = P£ 1.10

In 1717, Newton recorded the full-weight Spanish Dollar weighed 418 Grains (.87083 Ozt) @
4s. 6d. = £ 0.2250

The Mexican Dollar of 1765 weighed 0.86771 Ozt of 0.785416667 Fine Ag: = £ 0.2498

In 1777, the English Mint recognized this coin @ 5s.

1765: 1 Troy Oz.Silver (Spanish Coin) = S$ 1.00
1765: 1 Troy Oz. Silver (Coin: Intrinsic) = S$ 1.2732
1777: 1 Troy Oz. Silver (UK Mint Value: Span. Coin, Intrinsic) = £ 0.3180
 



The Spanish American Dollar of 1777 weighed 0.86042 Ozt of 0.772654 Fine Ag: = £ 0.2539

1777: 1 Troy Oz. Silver (Span Amer Coin) = S$ 1.00
1777: 1 Troy Oz. Silver (Span. Coin: Intrinsic) = S$ 1.2942
1777: 1 Troy Oz. Silver (UK Mint Value: Span. Coin, Intrinsic) = £ 0.3286 
 


John McCusker's How much is that in real money? Table C-1 erroneously assumes '4s. 6d.' per S$1., w/depreciation of Pennsylvania Money "300%"

The cost for workmanship was P£ 0.7636/Ozt (=£ 0.2281)


Given the corrected coin weights/assays, the (Pennsylvanian) £ was depreciated 334.781% 

1777: 1 Troy Oz. Silver (UK Mint Value: Span. Coin, Intrinsic) = £ 0.3286 
August 1777: 1 Troy Oz. Silver (Span. Coin: Intrinsic @ Phila.) = P£ 1.10
August 1777: 1 Troy Oz. Fine Ag Labor = £ 0.2281 / S$ 1.1628