1973 DDO 5c Queen Double Neck

I'm not sure if I'm allowed to post outside links here, but it looks like an error posted on coinsandcanada. Error #3714.

What am I missing? Is that not a reliable site for errors?

Thanks

Thanks, still learning.

Coins and Canada have it listed as "Double Queens Back" but when CAC refer to "Double" they are actually talking about Machine Doubling.

Machine Doubling happens during the strike of a coin and it is considered an Error like okiecoiner pointed out and some collectors do collect them but are not worth a premium.

A Doubled Die happens to the Die itself before the coin is struck, when the Mint is designing new Dies sometimes the process quite literally makes things doubled (Legend, Portrait, Numbers ect).

Than there is Die Deterioration Doubling, which also happens During the strike of a coin, but Die Deterioration Doubling is not really an error like that of Machine Doubling, reason being is Die Deterioration is just the result of an over used die that should have been pulled from the minting process sooner. Again some collectors do collect Die Deteriorated coins, however they are also not worth much of a premium.

Once you can tell the difference between Genuine Doubled Dies, Machine Doubling and Die Deterioration it is not something that is easily forgotten.

Thanks Meandice for the link.
In the French Forum section of CaC, your referred coin is clearly identified as " Machine Doubling" or "coin decale" in french. However the error section of the 1973 5 cents was never updated with the catagory (coin #3714).

I will ask for the update.