Accidental coins

So today I was looking at some of my slabbed coins and remembered this New Brunswick 1/2 cent.



Not a great grade but a fairly scarce coin. It got me thinking how many other coins across the world were accidentally minted. I don't mean mules either as such just coins that should never have existed as in this case New Brunswick never ordered a 1/2 cent due to their valuing of the dollar to the pound. Where as Nova Scotia did have the necessity of a half cent. In error the Royal Mint assumed they would want one in New Brunswick too.

Most of these coins were contained however several thousand made it across the Atlantic presumably circulating in NS.

https://en.numista.com/catalogue/pieces22550.html

Interestingly, New Brunswick issued a 12½¢ postage stamp in 1860 (see here pp. 24-25). This, of course, is an eighth of a dollar, which is not a decimal value. I suppose it made some sense in 1860 to have such a value given that the decimal postage stamps predate the actual issue of decimal coins in 1861. Presumably, one used a combination of British &/or American coins to make it to 12½¢.

Note that by that time the US had moved to a small cent (from 1857) and had stopped producing ½¢ coins. I am not sure whether the British colonies accepted the small cent at the same rate as the large cent, if at all. And I don't think a lot of Spanish silver was still in circulation by the early 60s (1 real = 1/8 of a dollar), but perhaps others on Numista have evidence to the contrary.

Mark,
Surely, mule coins are accidental coins, because, as you stated, they never should have existed.
I only have one mule coin, Isle of Man 50pence, KM#57a, of which I am very proud to own.I understand your reasoning, but I do disagree with the mule statement.Loved your pictured coin by the way

Citação: "COINMAN1"​Mark,
​Surely, mule coins are accidental coins, because, as you stated, they never should have existed.
​I only have one mule coin, Isle of Man 50pence, KM#57a, of which I am very proud to own.I understand your reasoning, but I do disagree with the mule statement.Loved your pictured coin by the way

​I said no mules because I suppose it's fairly easy to mismatch dies on the same flan diameter but this coin and the type I'm wondering about were never ordered. Somehow it got through the design stage. Then the die sinking, striking until the full mintage was reached then even shipping before their accidental assumption was realised I imagine a manager at the mint then said "oh s**t there's no order for these 1/2 cents"

I believe it to be quite a series of blunders :D

Citação: "Mark240590"​So today I was looking at some of my slabbed coins and remembered this New Brunswick 1/2 cent.
​
​
​
​Not a great grade but a fairly scarce coin. It got me thinking how many other coins across the world were accidentally minted. I don't mean mules either as such just coins that should never have existed as in this case New Brunswick never ordered a 1/2 cent due to their valuing of the dollar to the pound. Where as Nova Scotia did have the necessity of a half cent. In error the Royal Mint assumed they would want one in New Brunswick too.
​
​Most of these coins were contained however several thousand made it across the Atlantic presumably circulating in NS.
​
​https://en.numista.com/catalogue/pieces22550.html

​The coin page doesn't have an edge description. Could you add it?

Might not be quite what the OP is looking for, but the first one that comes to mind is the Jordan 1 fil.
Someone at the mint didn't realize that "fils" was also the correct singular, and "corrected" the "plural".

There's of course always the Constantinian ruble (or however you spell it) of 1825, but that one got stopped fairly early.

Similarly then this mis-spelling ...
https://en.numista.com/catalogue/pieces99236.html
https://en.numista.com/catalogue/pieces22493.html
which the singular is Sou and plural is Sous but on
there is Un Sous mixture.

Citação: "nthn"​

Citação: "Mark240590"​So today I was looking at some of my slabbed coins and remembered this New Brunswick 1/2 cent.
​​
​​
​​
​​Not a great grade but a fairly scarce coin. It got me thinking how many other coins across the world were accidentally minted. I don't mean mules either as such just coins that should never have existed as in this case New Brunswick never ordered a 1/2 cent due to their valuing of the dollar to the pound. Where as Nova Scotia did have the necessity of a half cent. In error the Royal Mint assumed they would want one in New Brunswick too.
​​
​​Most of these coins were contained however several thousand made it across the Atlantic presumably circulating in NS.
​​
​​https://en.numista.com/catalogue/pieces22550.html

​​The coin page doesn't have an edge description. Could you add it?

​I'll take a look at it when I get some spare time this weekend. I've just finished night shift and I'm gunna stay up to get myself ready for days so I'm feeling a bit too tired to modify files just now.

Another type of accidental coin is this one:

https://en.numista.com/catalogue/pieces98081.html

In 1832, the Nova Scotia government placed an order for the same type of tokens as previously ordered (in the 1820s), and the manufacturer blindly followed the instructions. This means that they used the bust of George IV (ruled 1820-1830), even though William IV had been on the throne since 1830.

We need a face palm emoticon.

Citação: "Camerinvs"​Another type of accidental coin is this one:
​
​https://en.numista.com/catalogue/pieces98081.html
​
​In 1832, the Nova Scotia government placed an order for the same type of tokens as previously ordered (in the 1820s), and the manufacturer blindly followed the instructions. This means that they used the bust of George IV (ruled 1820-1830), even though William IV had been on the throne since 1830.
​
​We need a face palm emoticon.

​aha ! Yes I forgot this one !! Another great example !