Austria/Germany- What causes these lines on silver coins?

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kmatejka

Joined: 19 Tem 2013
Posts: 6

Posted: 27 Şub 2014, 02:56 #

Interested to hear theories...I have a few Austria/Hungary coins with this, maybe some German ones too. Looks like it is intentional and decorative, or maybe they were wrapped with string or ribbon to a box or envelope as a gift...?

neilithic

Closed account

Posted: 27 Şub 2014, 03:01 #

probably some heathen has had it cellotaped to something

nalaberong

Joined: 1 Ekim 2013
Posts: 1425

Posted: 27 Şub 2014, 03:05 #

You had me confused, I thought these were two sides of the same coin

Probably caused by tape. Here's a related big warning: Rubber bands contain sulfur and they will create an ugly black band on any silver item, even through plastic!

kmatejka

Joined: 19 Tem 2013
Posts: 6

Posted: 27 Şub 2014, 03:28 #

I've only seen them on one side of a coin- I suppose it could be a rubber band, and the coin was at the top or bottom of the stack...

apuking Catalogue referee

Joined: 31 Ekim 2012
Posts: 9391

Posted: 27 Şub 2014, 11:38 #

Well spotted must have been from a rubber band.

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nalaberong

Joined: 1 Ekim 2013
Posts: 1425

Posted: 28 Şub 2014, 05:03 #

I think a rubber band would cause the opposite colouration: dark bands on a light surface. This is more likely the work of tape or plastic.

neilithic

Closed account

Posted: 28 Şub 2014, 07:04 #

Or a piece of cloth like a shoelace or something. I've got and Austrian Corona with similar marks to the one you've shown

apuking Catalogue referee

Joined: 31 Ekim 2012
Posts: 9391

Posted: 28 Şub 2014, 09:16 #

Quote: nalaberongI think a rubber band would cause the opposite colouration: dark bands on a light surface. This is more likely the work of tape or plastic.

It could also be that the rest of the coin that was not under the rubber toned over the years, or the chemicals in the plastic discolored it.

neilithic

Closed account

Posted: 28 Şub 2014, 11:19 #

Yes, but the point was that rubber causes coins to discolour, so they wouldn't look nice and clean underneath, Which is why I think it's more likely to be ribbon or shoelace or tape.

Muenzenhamster