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 Replies: 17 / Views: 15,889 |
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Valued Member
Bulgaria
474 Posts |
Please help me for this coin, in my catalog for 1968 there is only copper-nickel coins 4.4 grams and in my collection really all francs 1968 and after 1968 are 4.4 grams. But this franc dated 1968 is GUARANTEED silver, high grade and only 3.9 grams. Some idea? Image:  1968silver.jpg70.12 KB Edited by Sap
04/09/2009 07:29 am
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Pillar of the Community
United States
3098 Posts |
Why would silver be lighter?
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Pillar of the Community
Poland
3201 Posts |
Silver Swiss francs weigh 5 grams. Who guarantees that this one is silver?
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Moderator
 United States
23731 Posts |
All Swiss 1 Franc coins after 1967 were made from copper-nickel KM# 24a.1.
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Valued Member
 Bulgaria
474 Posts |
Image: 1968silver2.jpg62.57 KB Friends, I know that all after 1967 is copper-nickel. But please see to the black traces the coin on white paper, and the track of Australian silver 6 pence. coin is exactly the same size as 1 franc coins after 1967, but certainly is not copper nickel. Some site with Swiss coins to know?
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Pillar of the Community
United States
3098 Posts |
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Pillar of the Community
Poland
3201 Posts |
Interesting. I dug out a 1968 Franc and 1968 1/2 Franc and they leave a very faint trace on paper, nothing like that pictured. I don't know if it's a good method of detecting silver, but the composition of the coin might be indeed different.
Edited by DL20K
04/01/2009 11:48 am
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Bedrock of the Community
United States
10045 Posts |
Not to dispute you, but the weight of 3.9g is nearly impossible for a silver 1 Fr.
Secondly, the amount of raised lines around 1 Fr. is very unusual. If one thing can be said about Swiss coins during this period, they are very consistent and high quality. Since other metals (such as base-metal) leave gray streaks on paper that's not conclusive I'm afraid...the weight is far more important here.
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Valued Member
Bulgaria
474 Posts |
Really I have over 500-600 silver coins and all leave gray-black streaks incl. 0.220 silver 19 c. german coins! I am sure - this is not copper-nickel, probably error but tomorrow will check with jeweler whether is silver or other.
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Bedrock of the Community
United States
10045 Posts |
Sorry--I did not mean to suggest you don't know the silver coins in your collection.
I've only observed that pewter and other base-metal alloys leave a streak too. I agree--CuNi does not leave such marks.
Another option--since 1 Fr was worth something in 1968, this could be a contemporary forgery meant to be spent.
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Valued Member
Bulgaria
474 Posts |
Another interesting fact - the coin has turned 180" avers, like coins before 1968, but is thick as coins after 1967 from copper-nickel alloy (not thin as silver before 1968)... please see picture. Image: 1968silver3.jpg39.87 KB |
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Moderator
United States
23731 Posts |
It could be that the mint made a few coins in silver for that year prior to the change over to copper-nickel.
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Valued Member
Bulgaria
474 Posts |
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Valued Member
United States
365 Posts |
Very interesting-- pretty compelling idea, a silver '68! I hope it is so!
How does one account for the weight differential, though?
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Pillar of the Community
United Kingdom
1077 Posts |
1968 and pre 1968 Swiss coins are aligned alike. They didn't switch to medal alignment until 1982.
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Pillar of the Community
United Kingdom
1077 Posts |
I really don't think this coin is silver. If it is thicker than a silver 1 Franc, but weighs less than a copper-nickel one it just can't be possible. Unless it's hollow.
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Replies: 17 / Views: 15,889 |
1968silver.jpg
Posted 04/01/2009 10:53 am
1968silver2.jpg
1968silver3.jpg
