RUSSIA. Nicholas I, 1825-1855. Platinum 12 Rubles, 1837 (mintage: 53)
Sold by Stack's from the Gund Collection on 1/15/2007 for $55,200
2/6/2014:
687
Russia. Nicholas I, 1825-1855. (Platinum) 12-Rouble, 1837, St.
Petersburg. Fb. 158. Mintage only 53 examples. From auction sale Hirsch
22 (1959), 1060. PP, only slightly touched.
Estimate: € 40,000.; Hammer price: € 100,000. Plus 15-23% Buyer Fee and VAT (EU.) Assuming a Russian buyer, € 123,000. (USD$ 167,302.)
2/6/2014 Platinum Spot @ USD$ 1,380.
On 3/4/2014, the U.S. Mint offered 1 Ozt Platinum Eagles at 4 % premium over Spot, to authorized dealers.
Estimated 2/6/2014 Platinum Bullion Coin, Wholesale@ USD$ 1,435.20
6/17/2015:
6/17/2015: Platinum Spot, 1500 EST USD$ 1,083
6/17/2015: Platinum Eagle Bullion, Whols. (+4%) $ 1,126.32
6/17/2015: APMEX Platinum BID $ 1,074.80; ASK $ 1,084.80
6/17/2015: APMEX Platinum Bar (Generic) ASK $1,139.79
6/17/2015: APMEX Platinum Eagle (Random) ASK $1,272.10
6/17/2015: APMEX Platinum Eagle (2014) ASK $1,484.10
6/17/2015: APMEX Platinum Eagle (2014 Proof) ASK $1,734.10
6/17/2015: APMEX Platinum Eagle (2014 Proof+) ASK $3,995.00
6/17/2015: WholesCoinDirect Pt Eagle (2014? Bullion) ASK $1,149.78 + $ 15.
The APMEX premium for Pt bullion was > 27.40% ; for Pt Eagles, 37.04% (7.56%)
The WCD premium for for Pt Eagles, 7.55% (Unavailable!)
5/18/2015:
5/18/2015: Platinum Spot, Close USD$ 1,174
5/18/2015: Ebay Platinum Eagle (2014 Proof) Sold $1,676.33
eBay auction premium for Pt bullion was 42.79%
1839: Where the USA imported Gold bullion from New Grenada valued at $ 2,496 ($20.6705/Ozt), only 120.75 Ozt Gold were recorded.
If less than 2% the total weight the imported Colombian Gold Dust, approximately 2.25 Ozt Platinum was residue at the US Mint.
1884: 1 Troy Oz. Pt (Paris: Col. Ore, .999) = Fr 34.14 (USD$ 6.60)
1884: 1 Troy Ounce Platinum (Paris: Mkt) = Fr 37.3242 (USD$ 7.215)
1884: 1 Troy Oz. Platinum (Paris: Mfg, Retail) = Fr 46.655 (USD$ 9.02)
The price for imported English-manufactured Platinum: Fr 1,405/Kg.
Oertling's Weights (Presumed Total: 138 g. ~ 4.437 Ozt:
1885: 1 Ozt. Platinum (UK: Mfg; Imp.; Tariff Fr.0.69) = Fr. 43.69 (USD$ 10.04)
1885: 1 Ozt. Platinum (UK: London Mfg) ~£ 1.70 (Fr. 43.)
1885: 1 Ozt. Platinum (Mfg* 2nd Class) = £ 1.35 (Fr 34.15)
Very Unlikely: Oertling's Weights (Total ? 46.003 g. ~ 1.479 Ozt)
1885: 1 Troy Oz. Platinum (UK: Mfg, Imported & Tariffed?) = Fr. 131.07
Factoring forex, the Russian ore price rose about 8.5% in October 1886.
1886: 1 Ozt Platinum (Germany: Mkt.) = Fr. 34.43 (ℳ 27.993)
1886: 1 Ozt Platinum (Germany: Mfg.) = Fr. 39.63 (ℳ 32.3476)
1886: 1 Ozt. US Platinum (US Refined) Fr. 36.14 - 36.26 (~ $ 7.)
1886: 1 Troy Oz. Platinum (NY: Semi-Mfg, Wire) ~ Fr. 40. ($ 7.75)
c. 1886/7: 1 Ozt. Platinum (UK: Mfg, Ret.) = Fr. 49 (~ £ 1.94)
1886: 1 Ozt platina (SPb: 82% Ore, Mkt) ~ Fr 19.45 (7.975 руб)
1886: 1 Ozt. Pt (SPb: 82% Ore, .999) ~ Fr 23.72 (9.726 руб)
October, 1886: 1 Ozt. platina (SPb: Ore, Mkt) = Fr. 21.10 (8.924 руб)
October, 1886: 1 Ozt. Pt (SPb: 82% Ore, .999) = Fr. 25.74 (10.884 руб)
1886: 1 Troy Oz. Platinum (Mkt) = Fr. 40.43
Citation: La Lumiére électrique, Vol. 42 (1891) p.165
Draughting or outline of, traced in metal (Finishing or research cost)
Draughing or outline of, traced in metal (Finishing or research cost) 
Meter Standards, Types I and II: unknown weight. Assuming the 1801 weight differential between meter and kilogram standards delivered to be the same, the meter should weight 2.24 kgs (71.92 Ozt)
1886: 1 Ozt. Iridio-Platinum Alloy (Imported: UK, Mfg w/ tariff) = Fr. 89.32
1886: 1 Ozt. Iridio-Platinum Alloy (UK: Mfg) = Fr. 87.91
Meter Standard, Type III, Tresca Form: ~3.5 Kgs, plus "various samples" (unknown weight)
Kilogram Standard: 2 Kgs, plus Metrical Weight Set (S. Oe and S. O: unknown weights)
Suspect?
