1967 (1867) silver dime mackerel coin

Hello all I have a silver dime here and I am trying to find out what its composition is as sites say 80/20 silver to nickel as well as 50/50 so just wanted to know how to tell.

https://en.numista.com/catalogue/pieces384.html

https://en.numista.com/catalogue/pieces230727.html

The easiest way to tell is the weight difference. 2.33g / 2.18g. Accurate digital scales are easily obtainable and very affordable.

Цитата: "harryg"​The easiest way to tell is the weight difference. 2.33g / 2.18g. Accurate digital scales are easily obtainable and very affordable.

​Unfortunately it's not as easy as it sounds. Every coin has a weight tolerance, let's say maximum + and - 5 %. For the silver .500 coin this means between 2.07 and 2.29 g. For the silver .800 coin this is between 2.22 and 2.44 g., which means there is a grey zone between 2.22 and 2.29 g. where it's almost impossible to determine the correct fineness only depending on weight.

Цитата: "Essor Prof"​

Цитата: "harryg"​The easiest way to tell is the weight difference. 2.33g / 2.18g. Accurate digital scales are easily obtainable and very affordable.

​​which means there is a grey zone between 2.22 and 2.29 g. where it's almost impossible to determine the correct fineness only depending on weight.

​Agreed, but I didn't say it was the only way to determine the difference, just the easiest way. For instance, a 1968 10c piece at .500 silver. Listed at 2.33g and according to my digital scale 2.35g. A 1968 10c piece (Nickel) listed at 2.07g and according to my scale 2.09g. Pretty accurate I would say.

Цитата: "harryg"​

Цитата: "Essor Prof"​
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Цитата: "harryg"​The easiest way to tell is the weight difference. 2.33g / 2.18g. Accurate digital scales are easily obtainable and very affordable.

​​​which means there is a grey zone between 2.22 and 2.29 g. where it's almost impossible to determine the correct fineness only depending on weight.

​​Agreed, but I didn't say it was the only way to determine the difference, just the easiest way. For instance, a 1968 10c piece at .500 silver. Listed at 2.33g and according to my digital scale 2.35g. Pretty accurate I would say.
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​I would have guessed with that weight it would be the .800 silver one.

Цитата ​​I would have guessed with that weight it would be the .800 silver one.

​I am using the 1968 examples as I don't have an example of the OP 1967. This was a transition period so you have to pay particular attention to the dates and even the mint it was made in..

Oh. Sorry I missed the different date.