4.58 gram 1984 Dollar

[purplepennyhunter]

The high cost of slabbing errors doesn't have us diving in get get our errors slabbed. We've had a couple done each which was really just testing the waters.

If they slabbed this now they would just put the planchet weight on the slab. But if we can identify it and have it graded as such will increase it's value I believe.

[ausjack]

identify it and have it graded as such will increase it's value I believe.

Ohhhh, now that's handy to know. Thanks PP :good:

[purplepennyhunter]

Doesn't "1995 UN 20c struck on thai temple token blank" sound better than "underweight magnetic 20c"?? Or "$2 struck on euro 10c planchet" better than "ugly weakly struck underweight $2"??

[markn]

If they slabbed this now they would just put the planchet weight on the slab. But if we can identify it and have it graded as such will increase it's value I believe.

You're absolutely right.  Identifying what this coin is struck on could double or even triple the value.

[purplepennyhunter]

Does anyone have a 1985 Jupiters Casino One dollar gaming token, it could be struck on one of those planchets?

[accumulator]

Could even be a Dreamworld Token planchet,excellent score & i hope you can find a match.

you might be able to ask this seller for an accurate weight.  http://www.ebay.com.au/itm/Dreamworld-Gold-Coast-Queensland-Token-X2-/111076522505?pt=AU_Exonumia_Medals_Tokens&hash=item19dcad3a09&nma=true&si=J6Uuw%252Ffnyd25Mih23RbdknJF0TM%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557

Nope ,not a dreamworld planchet , Dimensions:   25 mm (Diameter)
Weight:   5.525 g (Weight)

[purplepennyhunter]

Does anyone have a 1985 Jupiters Casino One dollar gaming token, it could be struck on one of those planchets?

OK I don't think it is. This token is way bigger.

[enworb]

A while ago there was a member who signed up from Adelaide who collected casino chips. It might be a good idea to contact him.

[Cobwebs]

Several years ago the Mint had a display of coins that had gone through the start up process. Basically getting the press pressure right. I don't know if the display is still there or not, if it is, it is worth taking a look.

The scan of the dollar does not look consistent with a weak strike but more like uneven wear.
A near 30 year old coin that looks different, is thinner than normal does not mean it is an error.
The link to the $1 struck on a 10c planchet shows a reasonably good strike, so good strikes can occur on cu/ni planchets even though the presses are set up for al/br.

[purplepennyhunter]

A while ago there was a member who signed up from Adelaide who collected casino chips. It might be a good idea to contact him.

Yep tried him :angel:

[trout]

I cannot find any reference in my Canadian resources that mention 5 cent coins being manufactured in Aus.
There is however some references the  Philadelphia Mint manufacturing some coins.
The Canadians changed from 0.995% Nickel to  0.75 Copper, 0.25 Nickel   in 1982.
the RAM may have been involved in producing planchet's for these, I don't know for certain.
as 1985 was a low mintage year for Australian cupro/Nickel coins I imagine they would have had the time and resources spare to be able to produce the planchets for Canada.
Just throwing possibilities out there :angel:

[markn]

Several years ago the Mint had a display of coins that had gone through the start up process. Basically getting the press pressure right. I don't know if the display is still there or not, if it is, it is worth taking a look.

The scan of the dollar does not look consistent with a weak strike but more like uneven wear.

I'll disagree with you there, it looks completely like a weak strike.

A near 30 year old coin that looks different, is thinner than normal does not mean it is an error.

It's not just a bit thinner, it's only just over 50% of the weight.  Given that an extremely worn coin (in Poor condition) shows almost no design and is typically still at least 75% of the original weight it's safe to assume this coin was struck underweight.  So, it is not worn and it is not damaged.

The link to the $1 struck on a 10c planchet shows a reasonably good strike, so good strikes can occur on cu/ni planchets even though the presses are set up for al/br.

The $1 on the 10c planchet shows weakness in many of the same spots this coin does.  When I have some time later I'll circle the areas I'm talking about.

[purplepennyhunter]

Several years ago the Mint had a display of coins that had gone through the start up process. Basically getting the press pressure right. I don't know if the display is still there or not, if it is, it is worth taking a look.

The scan of the dollar does not look consistent with a weak strike but more like uneven wear.
A near 30 year old coin that looks different, is thinner than normal does not mean it is an error.
The link to the $1 struck on a 10c planchet shows a reasonably good strike, so good strikes can occur on cu/ni planchets even though the presses are set up for al/br.

The display at the RAM (don't know if it is still there) was of proof 50c showing the strike at different pressures. Correct pressure was 140 tonnes. The image below is that coin struck at 20 tonnes pressure.

[markn]

The dollar on the 10c planchet on the left, the unknown planchet is on the right.  Remember the 10c error weighs 5.66g while the unknown errors is 4.58g (a full gram less).  You can see the similar areas of weakness circled.    It's a similar story on the obverse.  Interestingly the coin has a noticeable wire rim as indicated by the red arrows.  This suggests two things.  Firstly, the coin was put through a rimming machine and likely had nice high rims formed.  This means the localised striking pressure at the edges was high meaning some metal squeezed between the dies and the collar resulting in the wire rim.  Secondly, the wire rim is still quite prominent and sharp to touch, so the coin wasn't in circulation very long.

A further indication that the strike is weak is that the queens shoulder is directly behind the largest kangaroo's leg.  And not surprisingly the leg is very weak due to the metal flowing into the queen's shoulder.

[Cobwebs]

My main concern with the image, is the small lip on the rim. This appears to be raised.
If this is the case, then the press pressure was good. The mint called this "squirting". Seen on a lot of coins today.

Sorry, got to go to work, great that you disagree. I'll be back.