How are all the noodlers going?

[fred lever]

Re the "bubble", aha, thanks guys being an old school type I would have called them a "barnacle" !
Looks like pieces fracturing off the die faces thus the lump or bubble in the face of the coin.
I guess it shows up more on the later date coins as a consequence of the higher impact loadings on the dies at modern coining speeds and also the harder surface treatment of the dies to give the long life needed. In essence you would have little bits fracturing off the dies long before any major wear or buckling so no need to replace the die. In the olden days the dies would be wearing and mushrooming if a bit soft or just fracturing with a big crack long before they had too many little bits fracturing off. I do see the odd pre-decimal with a bubble but usually its a big clunk from the press and hey presto another big error coin!
Also thanks re the narrow date wide date i'll check my book entry.
Fred.
Fred.

[Hercules]

Bubbles can appear on many different die combinations, but these are the ones I always look out for:

2010 Standard 20c: Bubble above the platypus
Most of these were released in Brisbane, but have since been hoarded out of circulation. I've only found 9 so far, which equates to about 1.6% of standard 20c coins dated 2010, but this is probably an overestimate due to the fact that I live in Brisbane.


Source: Trout


2012 Standard 50c: Bubble behind the emu
This is the most common bubble variety, which makes up about 10% of circulating 50c coins dated 2012.


Source: Goldseeker


2014 Standard 50c: Bubble behind the emu
These are extremely scarce. I've only ever found two of them - one from change and one from noodling - and they make up no more than about 0.2% of standard 50c coins dated 2014.


Source: Goldseeker

[jens coins]

2012 50c COA bubble above kangaroo

[Pedro]

Here are some more common bubbles:

2012 20c bubble




2014 50c bubble between emu's legs. This one often (although not necessarily) appears on the same coin with the bubble on the top LH corner of the shield that I posted previously.




I'll follow up with a post of some of the bubbles that appear to be rare.

Pedro

[keldaw]

the above coin
also a couple of small cuds
 on top of the 5 in fifty .

[Pedro]

The following bubbles seem to be rare:

2014 20c




This (almost) bubble was on the same coin





2012 50c bubble on kangaroo's body






2013 50c bubble on kangaroo's leg




There is also this one - not a bubble in the normal sense but it tried hard (2014 50c)  




Nevol also found a 2014 50c with a bubble in the reeds to the left of the kangaroo's rump - as far as I am aware that is the only one that has been found.


Pedro

[Hercules]

2012 50c COA bubble above kangaroo

I've spent ages looking for that bubble, but never actually found one. How common do you think they are?

[Pedro]

[quote="Hercules" pid='113273' dateline='1513211404']

2012 50c COA bubble above kangaroo

I've spent ages looking for that bubble, but never actually found one. How common do you think they are?
[/quote]

They are quite common Hercules. If you PM me your address details I can add it to your collection.

Pedro

[Hercules]

2012 50c COA bubble above kangaroo

I've spent ages looking for that bubble, but never actually found one. How common do you think they are?

They are quite common Hercules. If you PM me your address details I can add it to your collection.

Pedro

They must be more common in NSW than in QLD, because until I saw the pictures again yesterday, I was beginning to think that they didn't exist, and someone was confusing the little bump in the reed with a bubble. :good:

[JeffH]

I'm Forever Blowing Bubbles

[ausjack]

Gee I lost count of how many bubbles I have and on what coins and the positions :blink: but I have a lot here somewhere.

[Hercules]

Gee I lost count of how many bubbles I have and on what coins and the positions :blink: but I have a lot here somewhere.

Maybe you should give Fred a heads up. I'm sure he'd love to know what you've found.

[ausjack]

I did that with Ian McConnelly and even sent him coins as well as photo's but nothing ever got done so it put me right off doing anything like that again. Anyone is quite welcome to look at threads like noodling finds or any of my previous posts or threads as I've posted a lot of pic's and descriptions over the years.

[fred lever]

I suppose the thing is "bubble" a bad descriptive word, a bubble is a globe of..stuff.....filled with something like air.
On all the coins we are looking at here , we have circular shaped incuse defects on a die face and somebody has coined the word bubble trying to categorise the phenomena with a easy word. That sort of defect is just a metal problem that nobody had a popular word for before because nobody cared as it is a production problem with no scientific or investigative merit. . I like "bubble" actually myself from the catchy point of view for an article heading! . I think the more you look the more you will find now especially as every body has a USB microscope and what you used to squint at in a x10 glass you can now scan with a x100 scope onto a 21" screen!  Is it worth an article by itself? yeah sort of. A lot of my articles are a bit of froth and bubble (!) as well as the dead serious ones. The problem with offering such an article is you are then accused of writing about rubbish topics in the numismatic world. Well I can write rubbish. I'll put it on the "To think about " list after the more dead serious miss strikes/overdates/die varieties and Xmas.
Freddo.

[Hercules]

I think the name "bubble" comes from the fact that it was first noticed above the platypus's claw on the Standard 2010 20c, where it looked like an air bubble caused by the platypus's swimming. Later, it was noticed on other coins like the Standard 2012 & 2014 50c, where the name "bubble" was reused in order to simplify discussions with those who were familiar with the one on the Standard 2010 20c. Thus, the name "bubble" has been lifted from its original context of being a small, circular defect beside the platypus to being a small, circular defect in any location on any coin. :ok: