Isle of Man 1990 Black Stamp 5 oz Silver

[Goose]

I noticed the above cased coin in a pawn shop today. I find no reference to it in my World Coin book. The coin is .999% silver, minted in Pobjoy, and certified by NGC as proof, but no designation (Pr-65, etc). Only 5K were minted and this coin is coin #1224. It is in a slab and cased in a black case approximately 8" x 8". There is a NGC slab #, but I didn't write down the number for reference. What would be a fair price to pay for this very nice coin?

[Australian coin]

spot price
haha I do a bit of a look up for ya

This 5 Crown proof commemorates the 150th Anniversary of the Penny Black postage stamp. Shown on the reverse is the said stamp, depicting Queen Victoria. This coin was struck in a revolutionary darkened proof finish, that gives the centre of the coin a pearl grey appearance

[Nevol]

Top stuff AC.  Agatha Christie, eat your heart out! :good:

[Australian coin]

Year:1990
Grade: Gem Proof - Proof
Denomination: 5 Crowns
Metal Content: 5 troy oz
Manufacturer: Pobjoy Mint
Thickness: 3 mm
Diameter: 65 mm
here is a plain one http://www.islandstampsandcoins.co.uk/isle-of-man-1990-penny-black-coin-5168-p.asp
I don't think its silver
oh it has the silver option if you select that tab
another CuNi Copper Nickel Cupro
http://www.talismancoins.com/servlet/Detail?no=2383
this one has no box http://www.ebay.com/itm/Isle-of-Man-1990-Penny-Black-Anniversary-Proof-Silver-One-Crown-Coin-With-COA-/191269463219?pt=UK_Coins_BritishRegional_RL&hash=item2c888c64b3
and this one http://www.ebay.com/itm/Isle-of-Man-1990-Penny-Black-Proof-Silver-Blackened-Crown-Coin-/111333345425?pt=UK_Coins_BritishRegional_RL&hash=item19ebfc0891
original page http://www.pobjoy.com/ukworld/section.php?xSec=1438
and im done

[Goose]

Thanks for the info Aus. coin, much appreciated. I didn't see any 5 oz coin info or price for the .999% silver Penny Black. The price for the one in the pawn store is U S $644....sort of high.

[triplewitch]

I know for the 1 oz coin the 'black' disappeared over time.