UK, 1966

In 1966, an ultra rarity numismatic item sold at 7.3x the Platinum Spot.

1965-6: 1 Troy Oz. Platinum (Bulk) = $100.





Duvivier Campo-Formio Medallion:
Diameter 3.5 cm 
Weight: 2.50 Ozt, 77.76 g.

 








Weight: 2.35 Ozt, 73.1 g.

Citation: Catalogue of the First Portion of Greek, Roman, and Foreign Medieval Coins and medals collected during the last 50 years by the late Thomas Thomas Esq., Sotheby & Co. Auction 7/8/1845



"a recent sale at Christie's (23 July 1965 or 1 March, 1966) , when Lord Margadale sold the coins and medals collected by his grandfather, Alfred Morrison, there is no less interest in commemorative medals of the past. Fig.3 for instance, a platinum medal dated the year 6 of the Revolution showing Napoleon as General-in-Chief of the army in Italy and commemorating the peace in that year, made £ 650. {USD$ 233. - 231.73} The artist is Duvivier. The reverse, the mounted conqueror crowned with a laurel wreath by, I presume, Victory, is no doubt banal enough in its severe neo-classic manner; it is interesting though, that, according to the inscription, it is not the nation which is expressing its thanks, but "Les Sciences et Les Arts Reconnaissants..."


7/24/1965-3/1/1966: 1 Troy Oz. Platinum (Numismatic Rarity) = $ 725.45 - 729.29

Specific Gravity of Gold Coins

1769:

Spanish Doubloon/ 4 Pistole (416 Grains/ 0.866666665 Ozt; 26.9563 g.) 



1810:

Where by Royal Edict, the 8-Escudo was to be minted at the weight of 27.1168 g. @ .875 (23.7272 Fine Au), a pristine 8-Escudo should weigh at least ~27.115 g, 418.475 English Grains Troy.

Citation: Universal Cambist and Commercial Instructor, being a general Treatise on Exchange, &c. Vol. 1, (1811) pp. 390-1





Cited in Kelley (1810), by English Mint Assay the "new" Spanish Doubloon/ 4 Pistole weighed (417 Grains/0.86875 Ozt; 27.02115 g.) but .864 Fine Au. However, this average coin weight was for circulated 1801 8-Escudos up to 1809, ~8 years. 

On average, a full-weight 1801 8-Escudo lost 0.1845 Grain Troy for each year of circulation. 





Presumed to be 366.1666667 Grains Fine Au (0.762847223 Ozt), 


The Huntington Collection Spanish Colonial, Later Republican and Related Coins, Wednesday 6 March 2013

A full-weight 8 Escudos Coin should be >27.10 g. (~418 Grains Troy) with 365.5 Grains (0.76146 Ozt) Au Fine Au
 
Bolivia: Carlos IV (1788-1808):
8 escudos, 1792 PR, Potosí, 27.01g (Ca. 99 [90]; Cy. 14484), VF  
8 escudos, 1795 PP, Potosí, older bust, 26.99g (Ca. 102; Cy. 14506), nearly VF
8 escudos, 1796 PP, Potosí, 26.97 g (Ca. 103; Cy. 14513), G-F
8 escudos, 1798 PP, Potosí, 26.98 g (Ca. 105; Cy. 14530), G-VF
8 escudos, 1799 PP, Potosí, 26.95 g (Ca. 106; Cy. 14536), VF/+
8 escudos, 1800 PP, Potosí, 27.02 g (Ca. 106; Cy. 14545), G-VF
8 escudos, 1804 PJ, Potosí, 26.98 g (Ca. 111; Cy. 14587), VF/+
8 escudos, 1805 PJ, Potosí, 26.99 g (Ca. 112; Cy. 14597), VF
8 escudos, 1806 PJ, Potosí, 26.98 g (Ca. 113; Cy. 14605), VF, Details
8 escudos, 1807 PJ, Potosí, 27.02 g (Ca. 114; Cy. 14614), VF
8 escudos, 1808 PJ, Potosí, 26.92 g (Ca. 115; Cy. 14623), VF, Details

Chile: Carlos IV (1788-1808):
8 escudos, 1789 DA, Santiago, bust of Carlos III 26.93g (Ca. 146; Cy. 14449), Details, VF
8 escudos, 1791 DA, Santiago, CAROL. IIII, 27.04g (Ca. 150; Cy. 14476), scuffed, G-VF
8 escudos, 1793 DA, Santiago, 26.96 g (Ca. 152; Cy. 14492), scuffed, VF+
8 escudos, 1794 DA, Santiago, 27.02 g (Ca. 153; Cy. 14499), G-VF
8 escudos, 1796 DA, Santiago, 27.02 g (Ca. 155; Cy. 14514), G-VF
8 escudos, 1797 DA, Santiago, 27.02 g (Ca. 156; Cy. 14524), VF
8 escudos, 1798 DA, Santiago, 27.09 g (Ca. 157; Cy. 14531), VF+
8 escudos, 1799 DA, Santiago, 27.00 g (Ca. 158; Cy. 14537), VF+
8 escudos, 1800 AJ, Santiago, 26.99 g (Ca. 161; Cy. 14548), G-VF 
8 escudos, 1801 AJ, Santiago, stop betw assayer’s initials, 26.99 g (Ca. 162; Cy. 14560), VF+
8 escudos, 1803 FJ, Santiago, 26.92 g (Ca. 165; Cy. 14578), VF 
8 escudos, 1804 FJ, Santiago, 27.01 g (Ca. 166; Cy. 14588), G-VF 
8 escudos, 1806 JF, Santiago, 27.01 g (Ca. 169; Cy. 14608) EF, "scarce"


Colombia: Carlos IV (1788-1808):
8 escudos, 1787 SF, Popayán, Carlos III 27.05 g (Ca. 140; Cy. 12993), G-VF
8 escudos, 1788 SF, Popayán, 26.88 g (Ca. 141; Cy. 13008), G-VF
8 escudos, 1789 SF, Popayán, first bust carlos IV, 27.06 g (Ca. 66; Cy. 14447), G-VF+
8 escudos, 1791 SF, Popayán, second bust, "IIII", 26.98 g (Ca. 69; Cy. 14470) G-VF 
8 escudos, 1792 JF, Popayán, 26.95 g (Ca. 70; Cy. 14482), G-F
8 escudos, 1793 JF, Popayán, 26.97 g (Ca. 71; Cy. 14490), G-F
8 escudos, 1794 JF, Popayán, 26.94 g (Ca. 72; Cy. 14497),~VF
8 escudos, 1795 JF, Popayán, 27.07 g (Ca. 74; Cy. 14505), G-VF
8 escudos, 1795 JF, Popayán, 26.87 g (Ca. 74; Cy. 14505), ~VF
8 escudos, 1796 JF, Popayán, 26.92 g (Ca. 75; Cy. 14512), VF
8 escudos, 1797 JF, Popayán, 26.93 g (Ca. 76; Cy. 14522), ~VF
8 escudos, 1799 JF, Popayán, 27.00 g (Ca. 78; Cy. 14535), G-VF
8 escudos, 1800 JF, Popayán, 27.05 g (Ca. 79; Cy. 14544), G-VF
8 escudos, 1801 JF, Popayán, 27.03 g (Ca. 80; Cy. 14557), ~EF 
8 escudos, 1802 JF, Popayán, 27.01 g (Ca. 81; Cy. 14566), VF
8 escudos, 1804 JF, Popayán, 27.05 g (Ca. 83; Cy. 14586), ~EF 
8 escudos, 1804 JF, Popayán, 26.94 g (Ca. 83; Cy. 14586), G-VF>~EF
8 escudos, 1805 JT, Popayán, 26.87g (Ca. 86; Cy. 14596), VF 
8 escudos, 1806 JF, Popayán, 26.98 g (Ca. 89; Cy. 14604), VF>G-VF
8 escudos, 1807 JF, Popayán, 26.95 g (Ca. 90; Cy. 14613), G-VF 
8 escudos, 1808 JF, Popayán, 27.00 g (Ca. 91; Cy. 14622), G-VF
8 escudos, 1808 JF, Popayán, Ferdinand VII, 27.03 g (Ca. 63; Cy. 16362), G-VF >~EF
8 escudos, 1809 JF, Popayán, Ferdinand VII, 27.03 g (Ca. 65; Cy. 16371), VF
8 escudos, 1809 JF, Popayán, Ferdinand VII, 27.08 g (Ca. 65; Cy. 16371), VF
8 escudos, 1810 JF, Popayán, Ferdinand VII, 27.05 g (Ca. 67; Cy. 16380), VF
8 escudos, 1811 JF, Popayán, 27.02 g (Ca. 69; Cy. 16396), ~VF
8 escudos, 1812 JF, Popayán, 27.09 g (Ca. 71; Cy. 16410), G-VF+
8 escudos, 1814 JF, Popayán, 27.00 g (Ca. 74; Cy. 16436), G-VF
8 escudos, 1815 JF, Popayán, 26.89 g (Ca. 75; Cy. 16448), ~VF
8 escudos, 1816 FM, Popayán, m.m.P, 27.02g (Ca. 78; Cy. 16458), ~EF
8 escudos, 1816 FR, Popayán, m.m.Pn, no stop betw. FR, 27.00 g, EF
8 escudos, 1817 FM, Popayán, m.m.P, 27.00 g (Ca. 79; Cy. 16471), G-VF
8 escudos, 1818 FM, Popayán, m.m.P, 26.90 g (Ca. 81; Cy. 16482), G-VF > ~EF
8 escudos, 1819 FM, Popayán, m.m.P, 26.96 g (Ca. 82; Cy. 16488), VF
8 escudos, 1820 FM, Popayán, m.m.P, 26.93 g (Ca. 83; Cy. 16498), ~VF
   
8 escudos, 1787 JJ, Nuevo Reino, 26.93 g (Ca. 198; Cy. 12992), VF
8 escudos, 1789 JJ, Nuevo Reino, first bust, 26.99 g (Ca. 116; Cy. 14446), VF
8 escudos, 1791 JJ, Nuevo Reino, first bust, numeral IV, 27.00 g (Ca. 119; Cy. 14466), F
8 escudos, 1793 JJ, Nuevo Reino, second bust, 26.95 g (Ca. 122; Cy. 14488), G-VF
8 escudos, 1794 JJ, Nuevo Reino, 26.88 g (Ca. 124; Cy. 14496), Det.;VF/G-VF
8 escudos, 1795 JJ, Nuevo Reino, 27.00 g (Ca. 125; Cy. 14503), G-VF
8 escudos, 1796 JJ, Nuevo Reino, 27.04 g (a. 126; Cy. 14511), G-F > ~VF 
8 escudos, 1797 JJ, Nuevo Reino, 27.08 g (Ca. 127; Cy. 14520), VF/+
8 escudos, 1798 JJ, Nuevo Reino, 27.07 g (Ca. 128; Cy. 14528), G-VF  
8 escudos, 1799 JJ, Nuevo Reino, 26.90 g (Ca. 129; Cy. 14534), VF
8 escudos, 1800/1799 JJ, Nuevo Reino, 26.91 g (Ca. 130; Cy. 14541), VF
8 escudos, 1801 JJ, Nuevo Reino, 26.85 g (Ca. 133; Cy. 14556), G-VF
8 escudos, 1802 JJ, Nuevo Reino, 26.90 g (Ca. 135; Cy. 14565), VF 
8 escudos, 1803 JJ, Nuevo Reino, 27.07 g (Ca. 137; Cy. 14574), G-VF > EF
8 escudos, 1804 JJ, Nuevo Reino, 27.03 g (Ca. 139; Cy. 14584), VF>G-VF
8 escudos, 1805 JJ, Nuevo Reino, 27.09 g (Ca. 141; Cy. 14594), VF
8 escudos, 1806 JJ, Nuevo Reino, 26.91 g (Ca. 142; Cy. 14602), VF+
8 escudos, 1807 JJ, Nuevo Reino, 27.13 g (Ca. 143; Cy. 14612), G-VF
8 escudos, 1811/10 JF, Nuevo Reino, 26.87 g (Ca. 96; Cy. 16393), ~VF
8 escudos, 1812/11 JF, Nuevo Reino, 26.97 g (Ca. 98; Cy. 16406), VF

8 escudos, 1813 JF, Nuevo Reino, 27.03 g (Ca. 101; Cy. 16421), G-VF  
8 escudos, 1814/13 JF, Nuevo Reino, 27.03 g (Ca. 102; Cy. 16434), ~VF
8 escudos, 1815/14 JF, Nuevo Reino, 27.10 g (Ca. 104 var.; Cy. 16446), VF
 

Others:
8 escudos, 1792 JF, Popayán, 27.00 g ( Cy. 14482), ~VF
(11/26/2010: Monnaies d’Antan, Mail Bid Sale 8)
8 escudos, 1799 JF, Popayán, 26.93 g (Ca. 78; Cy. 14535), ~EF 
(5/19/2012: Numismatica Ars Classica NAC AG, Auction 65, Lot 3165) 8 escudos, 1805 JT, Popayán, 26.96g (Ca. 86; Cy. 14596), VF  
(5/19/2012: Numismatica Ars Classica NAC AG)
8 escudos, 1805 JT, Popayán, 26.99g (Ca. 86; Cy. 14596), EF  
(5/19/2012: Numismatica Ars Classica NAC AG)



8 escudos, 1807 JF, Popayán, 26.99 g (Ca. 90; Cy. 14613), ~EF 
(5/19/2012: Numismatica Ars Classica NAC AG)
8 escudos, 1808 JF, Popayán, 26.95 g (Ca. 81; Cy. 14622), G-VF
(5/19/2012: Numismatica Ars Classica NAC AG)


8 escudos, 1816 JF, Popayán, 26.93g (Ca. 78; Cy. 16458), G-VF
(5/19/2012: Numismatica Ars Classica NAC AG)


8 escudos, 1796 JJ, Nuevo Reino, 27.26 g (Ca. 126; Cy. 14511), ~VF 
(5/19/2012: Numismatica Ars Classica NAC AG)

 
1818: citing 1803 study - Geo. III Guinea (1786-88), Average Specific Gravity = 17.442









c.1802:


1814:  c. 1800 Spanish Gold Coin, Specific Gravity 17.655.  (.8985 Au, .08 Ag, .02 Cu)


1827:


c.1832:






1859: Specific Gravity of hammered Gold, 19.36, Copper 8.95, Platinum 22.06


c.1872/3:



c. 1893:

UK, 1898: Numismatic value of Early 19th C. Russian Coin & Medal

DSQ

1898: 1 Troy Oz. Platinum (NYC: Ingot, Mkt Avg.) = £ 2.64 (USD$ 12.79)


August 1898: 1 Troy Oz. Platinum (Mkt) = £ 2.50 - 2.80
September 1898: 1 Troy Oz. Platinum (Mkt) = £ 2.80

Citation: The Electrical Review, Vol. 43 pp.



































c.1897/8: 1 Troy Ounce Platinum (Scrap) = £ 1.99 

Citation: The Electrical Journal, Vol. 41 6/3/1898 p.189


1898: 1 Ozt. Platinum (Ingot, Mkt) = £ 3.675
 
Citation: Engineering and Mining Journal, Vol. 83 6/1/1907 p.1040





c. February 1898: Platinum Price Range?


April, 1898: Platinum Still



Where the estimated value of Platinum was half the Price of Dental Gold,

Where the February 1898 estimated value of a 3-Platinum coin (10.35 Grams, .975 Pure Pt) was £ 1.1250, 

February 1898: 1 Troy Oz. Platinum (Coin, Numismatic) = £ 3.38

1898: 1 Troy Oz. Platinum (Mkt: Intrinsic) = £ 3.0 (USD$ 14.56) 

circa December 31, 1898:




1898: 1 Troy Oz. Platinum (Mkt: Intrinsic) = £ 3.68 (USD$ 17.84) 


 
Factoring London refining cost (£ 0.0625):

1898: 1 Troy Oz. platina (Australia: Ore, 76.9% Pt) = £ 1.6496 (USD$ 8.00)
1898: 1 Ozt. Pt (Australia: NSW Ore, .999 Pt) = £ 2.145 (USD$ 10.40) 
1898: 1 Ozt. Platinum (Australia: NSW Ore, .999 Pt) = £ 2.21 (USD$ 10.70)

Citation: The Wealth and Progress of New South Wales, 1898-9;Sir Timothy Augustine Coghlan  p.389



Dental Platinum Pin weight:  ~0.02274 g. = ~0.351 grain troy