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1989 underweight quarter

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Wade
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 Posted 01/03/2012  6:30 pm Show Profile Check Wade's eBay Listings Bookmark this topic Add Wade to your friends list Get a Link to this Message

found this today in a bank roll,

the entire surface has a fairly even dull matte finish, except on the highest of the high points.

the back has some pretty good random pitting.

tips the scales at 4.7g - 4.75g (reg quarter from that year 5.05g) although it seems the same thickness.

thoughts?











thanks
wade

Edited by Wade
01/03/2012 6:31 pm
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 Posted 01/03/2012  7:36 pm  Show Profile Bookmark this reply Add coincollect1 to your friends list Get a Link to this Reply
are those indents on the coin?
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 Posted 01/03/2012  7:53 pm  Show Profile Bookmark this reply Add Ugly to your friends list Get a Link to this Reply
Looks like the planchet it was made from is full of gas bubbles or something, be fun to cross section that one.

I have no idea why it's underweight unless those holes are representative of metal missing through the entire coin. All heavily circulated coins are a little underweight to start with.
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 Posted 01/03/2012  8:48 pm  Show Profile Check Wade's eBay Listings Bookmark this reply Add Wade to your friends list Get a Link to this Reply
ya but its not really heavily circulated, at least in wear and tear, there is still a lot of crisp detail.

would the lack of plating make up for the weight loss?

at first I thought someone had sandblasted or etched off the plating but then the whole thing should be worn?

then considering the condition of the planchet I figured more likely a mint error (plating issue?)

wade
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 Posted 01/03/2012  9:09 pm  Show Profile Bookmark this reply Add Ugly to your friends list Get a Link to this Reply
Those coins weren't plated in 1989 they were made from pure nickel, their specified weight is 5.07 grams, same as all the way to 1968. There are several metal impurities and cooling problems that can cause gas bubbling in nickel.

But really, I have no idea what's going on here.
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 Posted 01/03/2012  9:11 pm  Show Profile Check SPP-Ottawa's eBay Listings Bookmark this reply Add SPP-Ottawa to your friends list Get a Link to this Reply
Is the coin magnetic?
"Research is what I am doing, when I don't know what I am doing" --Wernher von Braun

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 Posted 01/03/2012  10:34 pm  Show Profile Check Wade's eBay Listings Bookmark this reply Add Wade to your friends list Get a Link to this Reply
ya, sorry, it is magnetic
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 Posted 01/03/2012  11:25 pm  Show Profile Check Wade's eBay Listings Bookmark this reply Add Wade to your friends list Get a Link to this Reply
R.Canadian Mint 1990 fiji 10 cent piece, 4.78g , 23.6mm , nickel bonded steel ?

not sure how the mint works, could canadian 1989 quarters have been made after the 1990 fiji coin ?

is there a database that shows detailed production for the RCM ?

thanks
wade
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 Posted 01/03/2012  11:45 pm  Show Profile Bookmark this reply Add Ugly to your friends list Get a Link to this Reply
If it is nickel bonded steel you should see a difference in metal colour at the rim because it's a basically a nickel clad steel coin, not plated, clad - so a sandwich of metals similiar to a US quarter (except with steel, not copper alloy). Might explain those divots in the coin as rust holes from pitting?

There's no database of what they make, half the time I think they take on work at a loss just to keep people employed and don't tell us in the reports. The only website I know of with references like that is here and it's not well arranged.

http://www.coinscan.com/for/foreign.html


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 Posted 01/03/2012  11:54 pm  Show Profile Bookmark this reply Add west- canuk to your friends list Get a Link to this Reply
Would acid have created the pebbly finish and divots ?
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 Posted 01/04/2012  12:14 am  Show Profile Check Wade's eBay Listings Bookmark this reply Add Wade to your friends list Get a Link to this Reply
i looked through coinscan, thats where I came up with the fiji 10cent. I thought nickel bonded steel was an alloy rather than plated. if it was plated I would expect the low areas to be shiny and if the higher areas polished off they would oxidize, but this is in reverse. the high spots on the coin (rim, lettering etc) are more polished than the low relief areas which has the 'matt' finish.

i would think acid would erase a lot of the finer details. the jewels in the crown, hair/eye on the cariboo etc are all really crisp.

the divots do look like voids or bubbles, and the matt finish looks more like oxidation than a "finish".

with the weight being low I was thinking thin planchet but the details are all there.

bad planchet or foreign?
Edited by Wade
01/04/2012 12:36 am
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 Posted 01/04/2012  09:01 am  Show Profile Bookmark this reply Add Ugly to your friends list Get a Link to this Reply
No way to know without a metal analysis. It's still an interesting find. From casual photo observation it looks like solid nickel, so I'm leaning more to bad planchet.

But yeah, nickel bonded steel is a sandwich, bare on the edges as I said. Steel and nickel look alike but you'd still notice a change in colour.
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