Discussion of the various sources of sovereigns reminds me of the Bank of Greece's rates to buy and sell sovereigns:
A.SOVEREIGN
99 GOLD OF FINENESS* 0.995 - 1.000 PER GRAM ** 46,72 euros ask; 52,79 euros bid
B. SOVEREIGN: FINENESS 0.9166 (7,940 - 7,988 GRAM)
01 OLD SOVEREIGN 345,52 ask, 416,59 bid
02 NEW SOVEREIGN (minted up to 1973 inclusive) 345,52, ask; 416,59 bid
03 NEW SOVEREIGN (minted from 1974 onward) 345,52 ask; 412,79 bid
04 SOVEREIGN defective in appearance 335,14 ask; 404,10 bid
C. SOVEREIGN : UNDERWEIGHT or OF DIFFERENT FINENESS
05 UNDERWEIGHT SOVEREIGN OF FINENESS 0.9166 (7,900 - 7,939 GR) 329,82 372,75
06 UNDERWEIGHT SOVEREIGN OF FINENESS 0.9166 (7,500 - 7,899 GR) 313,12 353,88
07 UNDERWEIGHT SOVEREIGN OF FINENESS 0.9166 (7.000 - 7.499 GR) 292,24 330,29
08 ITALIAN MINTING SOVEREIGN OF FINENESS 0.905 318,89 360,42
09 LEBANESE MINTING SOVEREIGN OF FINENESS 0.720 254,93 288,25
D. COINS
80 FINENESS 0.900 PER GRAM 41,41 46,80
81 FINENESS 0.9166 PER GRAM 42,17 47,66
83 UNDERWEIGHT OF FINENESS 0.900 PER GRAM 41,00 46,33
84 UNDERWEIGHT OF FINENESS 0,9166 PER GRAM 41,75 47,19
85 ITALIAN or LEBANESE MINTING OF FINENESS 0.900 PER GRAM 39,94 45,15
86 LEBANESE MINTING OF FINENESS 0.720 PER GRAM
31,95 36,12
87 LEBANESE MINTING OF FINENESS 0.600 PER GRAM
26,62 30,10
88 LEBANESE MINTING OF FINENESS 0.500 PER GRAM
22,18 25,09
https://www.bankofgreece.gr/en/main...e8f26f310bb0