Australian 50c Captain Cook - Golden Colour Reverse?

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Author	Replies: 6 / Views: 1,730
Bas S Warwick Pillar of the Community New Zealand 526 Posts	Posted 05/09/2018 01:05 am Picked this 50c up because I had not seen one with a gold reverse - (Captain Cook). Is this correct - if not what have I got? Report this Post to the Staff

sel_69l Bedrock of the Community Australia 21786 Posts	Posted 05/09/2018 03:18 am I occasionally come across mid to high MS copper nickel coins with a (sometimes) deep golden tone. I think that it must exposure to the right environmental chemistry, beyond more detail than that, I don't know. I don't think that it is mild exposure to heat. Report this Post to the Staff
Bas S Warwick Pillar of the Community New Zealand 526 Posts	Posted 05/09/2018 03:30 am ............this is quite odd as one side is very silvery(normal) and the other side is very golden. Quite a distinct difference - moreso than the image portrays Report this Post to the Staff
chafemasterj Pillar of the Community United States 6514 Posts	Posted 05/09/2018 05:53 am with sel 69I Check out my counterstamped Lincoln Cent collection: http://goccf.com/t/303507 Report this Post to the Staff
Bas S Warwick Pillar of the Community New Zealand 526 Posts	Posted 05/09/2018 06:10 am ..........but wouldn't the colour be the same on both sides? There is a very pronounced difference - Gold one side, Silver the other - rim is silver. Report this Post to the Staff
gxseries Pillar of the Community Australia 3831 Posts	Posted 05/09/2018 07:16 am It can happen. For instance If the reverse is exposed to high sulfur, ie left on a yellow envelope and with enough heat, it can result in an interesting tone. My partial coin collection http://www.omnicoin.com/collection/gxseries My numismatics articles and collection: http://www.gxseries.com/numis/numis_index.htm Regularly updated at least once a month. Report this Post to the Staff
chafemasterj Pillar of the Community United States 6514 Posts	Posted 05/09/2018 09:58 am I was just doing some reading on this since I posted. PVC contamination could cause the golden tone but that would presumably be both sides. Maybe it sat someplace like a desk for a long time with the reverse being exposed to direct sunlight? I don't know. You've got a good mystery there. Edit: gxseries has a good idea there. Check out my counterstamped Lincoln Cent collection: http://goccf.com/t/303507 Edited by chafemasterj 05/09/2018 10:00 am Report this Post to the Staff
	Replies: 6 / Views: 1,730

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