1801

UK:

Where the 1801 Rouble was (0.7571 Ozt * 0.875 Fine Ag =) 0.6625 Ozt Fine Ag
and The New Spanish Dollar was (0.875 Ozt * 0.883 Fine Ag) 0.773 Ozt Fine Ag

1 Ozt 'New Spanish Dollars' = £ 0.2875 - 0.2958 (0.883 Ozt Fine Ag) ∴ 
1 Ozt Fine Ag (Coin Bullion, intrinsic)  = £ 0.3208 - 0.3349

1 1801 Rouble = £ 0.2125 - £ 0.2219





 

c.1801:
руб Acc. 1. = £0.1164
руб Acc. 8.59 = £ 1.

руб Acc. 1. = £0.1164; руб Ag 1. = £0.1758
руб Acc. 8.59 = £ 1.; руб Acc. 5.69 






USA:
1801: Error and possibly older date? (Repeated into next decade, c.1815!)