I will start this at scrap silver value, and see where it goes, though there is some interesting stuff here, incluiding an 1846 Four Pence. 

(4) Half Crowns (2 old, 2 new = 1.28 troy ounces)
(1) 2 Shillings (0.1818 troy ounces)
(8) Shillings (4 older, 2 newer = 0.8546 troy ounces)
(4) 6 Pence (3 newer ones, 1 older one = 0.206 troy ounces 
(1) 4 Pence .0561 troy ounces
(9) 3 Pence (7 old ones .0420 troy ounces; 2 newer ones 0.0227 troy ounces)

2.90 troy ounces!

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