Australian-Coins Forum

Australian Coins, Banknotes and Exonumia => Australian Errors and Varieties => Topic started by: ausjack on March 23, 2013, 09:17:38 AM

Title: what's this??
Post by: ausjack on March 23, 2013, 09:17:38 AM
Sorry about the poor pic's as usual but wondering what you'd call this, it's an 81 50 cent
(http://i45.tinypic.com/awdbug.jpg)
(http://i47.tinypic.com/30vfzud.jpg)
(http://i46.tinypic.com/aadflh.jpg)
Title: RE: what's this??
Post by: Nevol on March 23, 2013, 12:22:35 PM
Possibly a poor quality in the metal mixture.
Title: RE: what's this??
Post by: robbiegal on March 23, 2013, 12:36:04 PM
hi jack
the picture is HUGE on my screen
but it looks to me like the rim has a ridge which ultimately could become  a split planchet the coils of metal for the planchet are rolled and rolled and rolled
so a mix that is partially separating can result in tears in the metal, and ultimately in planchet peels or shatter

the '81s  show up with a lot of errors and i've been told it was because there a was a strike at the RAM and the apprentices were running the minting show
Title: RE: what's this??
Post by: Ozcoins on March 23, 2013, 12:59:29 PM
AJ does it sound normal when you tap it?
Title: RE: what's this??
Post by: Triggersmob on March 23, 2013, 03:22:03 PM
I had a few coins like that, back in the 80s and 90s.
When you dropped them, they sounded hollow.
Before I started collecting seriously, I would wedge a
screwdriver in them and finish splitting them.
Title: RE: what's this??
Post by: ausjack on March 23, 2013, 03:56:58 PM
sounds same hit with hammer :)
Title: RE: what's this??
Post by: trout on March 23, 2013, 03:58:44 PM
Quote from: 'ausjack' pid='10370' dateline='1364016418'sounds same hit with hammer :)

WOW love your delicate way of testing AJ :laugh2::laugh2:
Title: RE: what's this??
Post by: ausjack on March 23, 2013, 04:16:22 PM
just a little tap, I was gonna drop it on the concrete but thought better :blush2: I was gonna try Steve's idea, I like his stye as well :good:
Title: RE: what's this??
Post by: Fulvio on March 26, 2013, 10:04:44 PM
I heard someplace that repeated boiling/freezing can make these split. I would imagine it would take an awful lot of cycles so I've never tried, but its got to be better than dropping them on concrete, no?
Title: RE: what's this??
Post by: ausjack on March 27, 2013, 08:13:26 AM
:mocking: I'm pretty bloody rough Fulvio but not quite that rough..yet
Title: RE: what's this??
Post by: Nevol on March 27, 2013, 08:15:19 AM
QuoteI heard someplace that repeated boiling/freezing can make these split
We had a member here who tried that, but I think he ended up putting the coin back in the wild.
Title: RE: what's this??
Post by: ausjack on March 27, 2013, 08:27:12 AM
:fie: I didn't do it, I didn't do it, wasn't me..who else could it be?
Title: RE: what's this??
Post by: enworb on March 27, 2013, 09:06:21 AM
I was the silly bugger who tried the freezing then heating method. My coin looked a lot more split that yours is and it didnt work on that one.
Title: RE: what's this??
Post by: ausjack on March 27, 2013, 09:48:23 AM
Thanks enworb..saved me a bit of trouble mate :good:
Title: RE: what's this??
Post by: Fulvio on March 27, 2013, 10:16:18 AM
That may be where I remembered it from then.

But... why toss them back? I work on the principle that you can keep a coin many times, but you can only throw it away once. Therefore only actual junk gets rejected. Not like they're ever going to be worth less than face value, right? :)
Title: RE: what's this??
Post by: trout on March 28, 2013, 09:50:44 AM
I found this today, the mark is raised.
is it a die crack or a slight planchet flaw?
I am leaning towards the latter :ok:
[attachment=1556][attachment=1557]
Title: RE: what's this??
Post by: Nevol on March 28, 2013, 09:56:42 AM
Quotea slight planchet flaw
Yep, that's it! :whistle2:
Title: RE: what's this??
Post by: Fulvio on March 29, 2013, 05:48:51 AM
These planchet flaws seem to show up first as discoloured stripes, then the stripes sort of bubble up, and finally break the surface like yours. They can range from a flake or two to a split all the way across the coin. I've got many examples, mostly 20¢ & 50¢ from the eighties, which seem most susceptible.

It would be nice if the progression was consistent and predictable, so we could "farm" them, eh? :)
Title: RE: what's this??
Post by: Goldseeker on March 29, 2013, 11:30:29 AM
I have heeps of $1 coins showing the same sort of thing.
Title: RE: what's this??
Post by: Fulvio on March 30, 2013, 11:17:51 PM
Goldy, you have heaps of $1 coins, period. I hear Armaguard visit you when they run short... :)
Title: RE: what's this??
Post by: Goldseeker on March 31, 2013, 11:55:12 AM
Nah, not true.   Over the past couple of years my NOODLING has somewhat slowed down.

The only heaps of $1 coins I have are errors, flaking, rabbits etc.