4.58 gram 1984 Dollar

[markn]

PPH and I have a new coin.  We'd love to say we found it in an old pilots helmet, or laying on the footpath, or dug it up in our back yard, or found it in our change.  But that would be a furphy.  

In fact, we bought it as a speculator off of eBay (thanks to a member here who pointed it out to us).  Today it arrived.  It weights 4.58g, appears to be copper nickel, is extremely weakly struck and does not appear to have been toyed with post mint (other than seeing a bit of circulation).  

So, does anyone have any ideas what planchet it might be struck on?  Anyone know where the RAM got their blanks in 1983/1984?  Or whether they were striking coins for other countries?

[Goldseeker]

Can you put up a scan of comparison of the thickness of the above to a normal $1 coin please.

[markn]

Your wish is my command.

[trout]

All I can think of is a 10 cent planchet But that Is 5.66g.
Being made of cu/nickel would explain the weak strike , the press would have been set up to take the softer ali/bronze planchet.

Sweet pickup mate , A really unusual coin :good:

[MattGold]

http://www.australian-threepence.com/blog/2012/12/australia-1984-one-dollar-error-struck-on-copper-nickel-10c-planchet.html

I was thinking the 10 cent planchet too only because I remember seeing this when I first started collecting haha.

[markn]

http://www.australian-threepence.com/blog/2012/12/australia-1984-one-dollar-error-struck-on-copper-nickel-10c-planchet.html

I was thinking the 10 cent planchet too only because I remember seeing this when I first started collecting haha.

When it arrived I thought 10c planchet too.  But it's nearly a gram underweight.  The Canadian Nickel of that period is 4.6g and is a similar looking copper nickel alloy.  I wonder if the RAM and the RCM were sourcing planchets from the same place?

[ausjack]

wow that's a good score Mark :good: these things trip me out how one, they happen and two, how they make it out..very strange indeed

[enworb]

Very cool!

[trout]

These are the speccs for a 1984 Canadian 5 cent coin.
Looks like a pretty near perfect match :ok:


Diameter: 21.21 mm
Thickness: 1.70 mm
Weight: 4.54 g
Edge: Smooth
Composition: 0.75 Copper, 0.25 Nickel

[Unicorn]

Very cool ...... no sure how you managed to get that one past ShaneW the oddity wicket keeper!

The side view sure is lean in comparison.

[Goldseeker]

Thanks for that markn, you have truly found a wonder.   Maybe a couple of scans shot off to the RAM may get some answers.

One can only ask.

[purplepennyhunter]

We're doing our own sleuthing. This was right around the Mint wound down it's own production of planchets in favour of Korean imports. I have the foreign coin production list from the 84 RAM report on it's way and another idea is a medal or token perhaps the monorail.

Either way it's a dead ringer for a 10c except that it's a bit under.

[trout]

We're doing our own sleuthing. This was right around the Mint wound down it's own production of planchets in favour of Korean imports. I have the foreign coin production list from the 84 RAM report on it's way and another idea is a medal or token perhaps the monorail.

Either way it's a dead ringer for a 10c except that it's a bit under.

Any updates on this coin yet?
This is by far one of the most interesting coins posted for quite a while.
I'm sitting on the edge of my seat here Mate :angel:

[markn]

Any updates on this coin yet?
This is by far one of the most interesting coins posted for quite a while.
I'm sitting on the edge of my seat here Mate :angel:

Nope, nothing.  We're waiting for the foreign coin section of the 1984 RAM annual report to show up in the post.

It's a really interesting coin, that's for sure!

[trout]

I imagine that this one will end with a first class ticket to the States :good: