Rarest Coin/Token in your Collection

Quote: "Choucas"​Also one that is waiting to be accepted, 97 NRI (that's logical because if not yet accepted, other people than you can't add it ) : https://en.numista.com/catalogue/pieces131878.html

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Quote: "CassTaylor"​Also, finally found a coin of mine that is NRI 97;
​https://en.numista.com/catalogue/pieces113916.html
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​Venetian 1/4 Ducat of Pietro Grimaldi (ND 1751-52)
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​(Photos are from the Numista page but they are of my coin)

Quote: "nthn"​

Quote: "CassTaylor"​Also, finally found a coin of mine that is NRI 97;
​​https://en.numista.com/catalogue/pieces113916.html
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​​Venetian 1/4 Ducat of Pietro Grimaldi (ND 1751-52)
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​​(Photos are from the Numista page but they are of my coin)

​​Maybe I should replace it with this? I added reference numbers from that auction also.

Quote: "MIMAEL"​Hello
​I added this token to Numista.
​https://en.numista.com/catalogue/pieces103320.html

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​Numista Index rarity: 97- because it's me!
​I did research from period material. I found out everything about Britannia - Coal Mining in the Czech Republic during the Austro-Hungarian Empire. However, the second token or production information for which I was designed was not found and not found.
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​Is it rare if only one is preserved? Or are there more?
​" Who gives me information about the existence of the other and what it was intended for my colleague- (first) I will send a gift of a coin"
​Ahoj Ivan

Quote: "arvin11"​

Quote: "MIMAEL"​​Ahoj Ivan

​​The writing on token is related to Germany, as German companies write A.G. at the end of company name
​The translation of this is
​LIFE MEDIUM BEARING VER BRITANNIA CARBON Works A.G. SEESTADTLD. ROBERT BAY

Quote: "numinis"​P.S.: possibly some coins have higher NRIs just because collectors are unwilling to collect them.

Quote: "AshsCollectablesStore"​Wowser, update on my Dime, just hit 100 on the rarity index. I'm blessed!
​https://en.numista.com/catalogue/pieces125927.html

Quote: "COINMAN1"​Not necessarily. What if he/she has it to exchange, but not in his/her personal collection?
​Wouldthis gve it a rarity value of 100?

Quote: "COINMAN1"​nthn,
​Perhaps the owner does not collect that type of coin, so wants to exchange it for something he really wants.
​Just a guess.

Quote: "COINMAN1"​This is where we are different.
​I do not have any of my GB coins listed on Numista, but have lots of them listed as swaps. I know none of them are rare, so the rarity number is not affected by my actions.
​I understand both methods of thinking, so is there a right/wrong way of doing it?

Quote: "nthn"​

Quote: "COINMAN1"​Not necessarily. What if he/she has it to exchange, but not in his/her personal collection?
​​Wouldthis gve it a rarity value of 100?

​​Yes, but the only reason it would be for exchange, is if he owned it, therefore, in his personal collection. I understand the way he is doing it, but I don't think it is the "right" way.

Quote: "AshsCollectablesStore"​

Quote: "nthn"​
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Quote: "COINMAN1"​Not necessarily. What if he/she has it to exchange, but not in his/her personal collection?
​​​Wouldthis gve it a rarity value of 100?

​​​Yes, but the only reason it would be for exchange, is if he owned it, therefore, in his personal collection. I understand the way he is doing it, but I don't think it is the "right" way.

​​It would be the right way perfectly fine, I own it yes and infact mine is the exact one in the picture on the page. If I put on the listing that I have one in my collection and one for swap, that would imply I own 2 of them. happy 100!

Quote: "COINMAN1"​Ash,
​I assume that the token is only in your swap list, so you do really only have one. I see nothing wrong with this. Perhaps the system needs changing, so that collection and exchange coins are accumulated to give a rating.
​That would solve everything

Quote: "nthn"​Yes it can. If I put one in collection, and one for swap, only one will show up in my collection statistics.

Quote: "numinis"​
​What I find unclear is that there are more coins with NRI value 5 than coins with values 3 and 4.

Quote: "January First-of-May"​​Note how there's no coins at all with a NRI of 1 or 2 (in your collection, at least; no idea whether there are any in general - or, rather, I'm fairly sure there's no 1 yet, but have no idea about 2).
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​I wonder if, at least in theory, it goes back to 0, or whether 1 is the minimum possible... I guess maybe we'll find out in a few decades?

Quote: "numinis"​

Quote: "January First-of-May"​​Note how there's no coins at all with a NRI of 1 or 2 (in your collection, at least; no idea whether there are any in general - or, rather, I'm fairly sure there's no 1 yet, but have no idea about 2).
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​​I wonder if, at least in theory, it goes back to 0, or whether 1 is the minimum possible... I guess maybe we'll find out in a few decades?

​​I suspect that this is a mathematical peculiarity of the formula used to compute NRI, so that it cannot be smaller than 3. NRI of US Lincoln cent and German 1 Pfennig and French 5 centimes is 3; NRI of German 1 eurocent and Soviet 1 kopeck is 4. What can be more common than these coins?

Quote: "numinis"​
​​I suspect that this is a mathematical peculiarity of the formula used to compute NRI, so that it cannot be smaller than 3. NRI of US Lincoln cent and German 1 Pfennig and French 5 centimes is 3; NRI of German 1 eurocent and Soviet 1 kopeck is 4. What can be more common than these coins?

Quote: "druzhynets"​Personally for me, NRI is quite a useless metric - it shows the coin rarity only in Numista community context. It would be rather useful to see it as a coin popularity index, rather than rarity index.

Quote: "druzhynets"​Personally for me, NRI is quite a useless metric - it shows the coin rarity only in Numista community context. It would be rather useful to see it as a coin popularity index, rather than rarity index.