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Need Your Opinion On What Happened To These Coins

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Author Previous TopicReplies: 5 / Views: 1,269Next Topic  
Valued Member

Belgium
54 Posts
 Posted 06/16/2014  02:37 am Show Profile   Bookmark this topic Add jagoedo to your friends list Get a Link to this Message Number of Subscribers
I recently came into possession of 2 Belgian 20 francs dated 1935
They are not rare and pretty common. My first impression would be that they are fake (due to the bubbly damaged surface) but all the measuremens are fine (also did the specific gravity test). I also don't find any castmarks on the edges. These coins are pretty common so I wouldn't know why would anyone bother to counterfeit them. Those are .680 silver.

So if these are not fakes (not yet sure), I was wondering what could have damaged the surface like this.

Maybe some experts here could help me out.

Need-Your-Opinion-On-What-Happened-To-These-Coins

Need-Your-Opinion-On-What-Happened-To-These-Coins
Edited by jagoedo
06/16/2014 02:40 am
Pillar of the Community
United States
1666 Posts
 Posted 06/16/2014  03:59 am  Show Profile   Bookmark this reply Add Numismat to your friends list Get a Link to this Reply
Do you see any evidence of a loop or something that may have been soldered onto the edge and removed? I commonly see this bubbled look on silver coins that were exposed to the high heat of soldering.
Valued Member
Belgium
54 Posts
 Posted 06/16/2014  04:23 am  Show Profile   Bookmark this reply Add jagoedo to your friends list Get a Link to this Reply
The edges and the rims are pretty clean.
Could it maybe be a reaction with some kind of cleaning substance?
Edited by jagoedo
06/16/2014 04:54 am
Pillar of the Community
austrokiwi's Avatar
2087 Posts
 Posted 06/16/2014  06:42 am  Show Profile   Bookmark this reply Add austrokiwi to your friends list Get a Link to this Reply
I have some old thalers with such damage......one I recall Came from Israel and had come out of the ground.....I had to clean it( Acetone and distilled water only. When I freed it from the red dirt it was caked in it had very similar damage to what you have on your coins.....I think it is where the copper has been corroded away
Pillar of the Community
zxcccxz's Avatar
Canada
5417 Posts
 Posted 06/16/2014  1:47 pm  Show Profile   Bookmark this reply Add zxcccxz to your friends list Get a Link to this Reply
it's corrosion. Likely from being buried.
Valued Member
Belgium
54 Posts
 Posted 06/17/2014  02:54 am  Show Profile   Bookmark this reply Add jagoedo to your friends list Get a Link to this Reply
Great. Thank you all for the response. At least I know what could have caused this :)
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