Lowest precious metal content in a coin?

So basically, I was just scrolling in the catalog when suddenly I notice this: N#162089 

A billon coin with 0,0765% silver content! 

 I just thought this was a little silly as, can this even be considered billon? Therefore I ask you, are there any more coins with strangely low precious metal content you know of? Or just a composition with a metal in this quantity?

Actually someone has entered .000765 silver = essentially nothing! This is perhaps someone making a mistake on the catalogue entry, and not the real coin composition.

At that time the silver should't have been that debased probably three zeros to many.

For your question: There are countless coins, even modern ones with trace amounts of  multiple precious metals.

Definitely a catalog error. From pictures this coin looks as silver or  strong billon.

To your question:

Probably majority 3rd century and later Roman coins. Most had an intentional silver content of 1-3%, which mostly consisted of silver “plating”. Their technology was more complicate than that, and was achieved by chemically removing copper from the surface.

I like the seven metal medal! Where might one find such an interesting object? 😆

(Comment that this was replying to was deleted)

I can only answer for my collection. And here I have N#8454 with 20.8% silver, and N#134339 with 20.3% silver.

Marc16

So basically, I was just scrolling in the catalog when suddenly I notice this: N#162089 

A billon coin with 0,0765% silver content! 

 I just thought this was a little silly as, can this even be considered billon? Therefore I ask you, are there any more coins with strangely low precious metal content you know of? Or just a composition with a metal in this quantity?

If you perform an XRF-test on a piece of metal, maybe a coin, you will find many different metals.
Anything lesser than roughly 1 % will be considered contamination…
If your XRF-device is from really good quality you can find traces of nearly every kind of metal.
So imo a coin with 0,0765% Ag is not a silvercoin at all.

Marc16

So basically, I was just scrolling in the catalog when suddenly I notice this: N#162089 

A billon coin with 0,0765% silver content! 

 I just thought this was a little silly as, can this even be considered billon? Therefore I ask you, are there any more coins with strangely low precious metal content you know of? Or just a composition with a metal in this quantity?

This has been fixed.

lowest I can think of is this with only 10%

N#3550

FlyingRedPanda

lowest I can think of is this with only 10%

N#3550

Oh yeah that’s a good hit, this coin always makes me laugh when I see it on eBay as the sellers are always trying to sell 16g of silver, not 1.6g!

Just remembered this thing!

N#12264 

3%, Seems unnecessary to even add silver at that point.

Marc16

Just remembered this thing!

N#12264 

3%, Seems unnecessary to even add silver at that point.

Oh, are you sure it isn't 0.300? I agree that 3% is basically, and next to, nothing.

ngdawa

Marc16

Just remembered this thing!

N#12264 

3%, Seems unnecessary to even add silver at that point.

Oh, are you sure it isn't 0.300? I agree that 3% is basically, and next to, nothing.

I believe there was an old discussion about thai coins that included the answer that yes, that’s the actual silver content! 😅

Marc16

ngdawa

Marc16

Just remembered this thing!

N#12264 

3%, Seems unnecessary to even add silver at that point.

Oh, are you sure it isn't 0.300? I agree that 3% is basically, and next to, nothing.

I believe there was an old discussion about thai coins that included the answer that yes, that’s the actual silver content! 😅

I remember that.  https://en.numista.com/forum/topic131367.html

My lowest is this Swiss 5 rappen with only 5% silver: N#167