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Author Topic:  1917 Half Penny but with a twist  (Read 212 times)

Offline Sneaky

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1917 Half Penny but with a twist
« on: November 01, 2017, 00:45 »
So out on an old 1800's farmhouse last weekend and Michelle (got to start leaving her home...) finds the Half Penny below.

Not sure if it will show properly in the photos but it looks like it's "de-laminating". Now I know coins aren't laminated, or plated, but imagine an old chromed bumper off a car, and rust get's under the chrome and starts to lift it, that's what this coin looks like.

Anyone ever seen anything like it before?

Linkback: http://forum.kimbucktwo.com/index.php?topic=31982.0
  • Detector(s) owned/used: Garrett AT Pro, Minelab GoFind 40 <-- Michelle left it resting on bull bar, oops....
  • Oldest find: Michelle (1967) :-) 1913 Penny
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Offline Rwork

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Re: 1917 Half Penny but with a twist
« Reply #1 on: November 01, 2017, 02:07 »
Probably made in India. Have a look for an I mark. I guess things were a bit lax during the war.
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Offline Detectist

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Re: 1917 Half Penny but with a twist
« Reply #2 on: November 01, 2017, 07:29 »
Yes - I have a delaminating 6d

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Offline Sneaky

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Re: 1917 Half Penny but with a twist
« Reply #3 on: November 01, 2017, 10:56 »
Whale Oil Beef Hooked.

Who woulda thunk it? You learn something every day!
  • Detector(s) owned/used: Garrett AT Pro, Minelab GoFind 40 <-- Michelle left it resting on bull bar, oops....
  • Oldest find: Michelle (1967) :-) 1913 Penny


Offline daviddi

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Re: 1917 Half Penny but with a twist
« Reply #4 on: November 06, 2017, 13:43 »
Sneaky,
Fairly common condition of Australian copper pre decimal coins. I've often found in such "broken" condition, like the one you've found, but usually buried in soil that promotes such degradation and not necessarily deep either. The presence of oxygen, moisture and various compounds in the soil contributes to the problem.Despite the possibility of finding old coins in such crap conditions , it's still lot of fun trying. 

This 1923 Australian halfpenny I found about 2 and 1/2 years ago, is not in as extreme degraded condition as some , but was on it's way. Had it soaking in paraffin oil since I found it. Looked in really good shape when I first dug it up, but could not see the "lamination" starting to bubble.
With cleaning and up on closer inspection, with photography, it was fairly revealing and was realised that what was happening to this coin, brought is collectors value,  right down. 
I've never found an Aussie pre decimal silver with any delamination issues like Detectist's 6d example. That's a pretty unique condition for a old silver coin , at least for me it would have been.

Though not entirely related, I do have a couple of 20 cent pieces one 1980 and 1976, not found detecting and never buried in the ground, that unfortunately, (the one pictured on the right, I pryed apart too much when it was first found by my mum (overly enthusiastic 16 year old that I was). 

It's actually a design flaw due to production and is called a split planchet:
https://www.australian-coins.com/error-coins/split-planchet-decimal-coin-errors/

David Di


 



Offline ANT1967

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Re: 1917 Half Penny but with a twist
« Reply #5 on: November 06, 2017, 18:25 »
Sneaky,
Fairly common condition of Australian copper pre decimal coins. I've often found in such "broken" condition, like the one you've found, but usually buried in soil that promotes such degradation and not necessarily deep either. The presence of oxygen, moisture and various compounds in the soil contributes to the problem.Despite the possibility of finding old coins in such crap conditions , it's still lot of fun trying.

This 1923 Australian halfpenny I found about 2 and 1/2 years ago, is not in as extreme degraded condition as some , but was on it's way. Had it soaking in paraffin oil since I found it. Looked in really good shape when I first dug it up, but could not see the "lamination" starting to bubble.
With cleaning and up on closer inspection, with photography, it was fairly revealing and was realised that what was happening to this coin, brought is collectors value,  right down.
I've never found an Aussie pre decimal silver with any delamination issues like Detectist's 6d example. That's a pretty unique condition for a old silver coin , at least for me it would have been.

Though not entirely related, I do have a couple of 20 cent pieces one 1980 and 1976, not found detecting and never buried in the ground, that unfortunately, (the one pictured on the right, I pryed apart too much when it was first found by my mum (overly enthusiastic 16 year old that I was).

It's actually a design flaw due to production and is called a split planchet:
https://www.australian-coins.com/error-coins/split-planchet-decimal-coin-errors/

David Di


 







G’day David

    I gather you are / were aware of the value of the 1923 HP

It is in good condition
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Offline Sneaky

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Re: 1917 Half Penny but with a twist
« Reply #6 on: November 06, 2017, 19:18 »
Hi David,

mate thanks for your very informative response, I'm going to be doing some reading now....

I was always of the understanding that coins were an alloy and as such could not possibly "delaminate", how wrong I was....
The 20c is a very interesting example, I would never have believed it had I not seen it for myself, this hobby just keeps on giving, in more ways than one.

Cheers
  • Detector(s) owned/used: Garrett AT Pro, Minelab GoFind 40 <-- Michelle left it resting on bull bar, oops....
  • Oldest find: Michelle (1967) :-) 1913 Penny

Offline daviddi

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Re: 1917 Half Penny but with a twist
« Reply #7 on: November 06, 2017, 23:27 »






G’day David

    I gather you are / were aware of the value of the 1923 HP

It is in good condition

Yes, thanks ANT1967, I know it's a valuable coin , but it could have been worth a lot more. It was truly a surprise find for me even after detecting for so many years and finding so many others. Australian copper pre decimal coins buried in the some ground conditions just don't fair that well after 90 plus years.
  


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