I agree with a Machine doubling. If you want to see what a Double Die looks, take a look at this link. Your will see really nice DDO. https://www.coincommunity.com/forum/topic.asp?TOPIC_ID=363592&SearchTerms=1967,double,date You have to look at the "plit Serif". It's the best clue for DDO or DDR.

I agree with you. I vote for Mechanical Doubling

Traditional Flat field Doubling is usually more related to Proof coin manufacturing where a double strikes techniques is used.

You will find here a similar coin to yours. https://www.coincommunity.com/forum/topic.asp?TOPIC_ID=269077&SearchTerms=1968,double,die The first conclusion was "Flat Field Doubling", but after quick reading of all posts, the conclusion is not clear. The link will point out to additional reference. I ...

Here is an example of a genuine indentation signature coming from the mint.

This one is called: Partial Brockage.

More discussion here (in french).

https://numicanada.com/forum/viewtopic. ... rtiel+sp67

I agree with coinguy.

It's a Post Mint Damage or PMD.

All types of manufacturing errors from Mint are well known and your coin is not part of them.

Very nice banknote....

Try this site and enter "printing" in the search box.
You will get few banknotes similar to yours. Just scroll the list.
Many of them have been sold at many k$.

https://auctions.canadiancoinsandpaperm ... chArchives

Welcome to CoinsandCanada Avengers. Can you provide more informations about your banknotes? I guess you mean 1954, not 1958. We need to know the signatures name and paper quality. Uncirculated banknotes are more attractive. There's also versions with and without devil's face . If you can provide pic...

You can get a price idea here. I guess the coin is in Silver. https://www.coinsandcanada.com/coins-prices-collection.php?coin=silver-dollar-1974&p=5&cat=1 It will be difficult to grade this coin through the plastic case. I guess most scratches we see on your pictures are on the case surface. But in ...

I'm not sure that the partial brockage is there. This is why I want to see a closer look of the error. If there's no pattern within the indented region, the indentation is done by a planchet. In summary: partial indent (done by a planchet) or partial brockage (done by a previously struck coin). Ref:...

Can you provide a closer look of the error?

For sure, this coin is indented either by a planchet or a coin.

This is called a "ragged fissure". But many collectors uses also "ragged clip". You can find some information here: https://www.error-ref.com/fissures_-_ragged___smooth/ Recently similar coins have been sold on Ebay with sold prices between about 30 to 80$cnd. You have a nice one. The extended fissu...

Ya, you need to be more specific on your description.
And an obverse picture could help.

Here is a tip-tilt platform I recently developed. Nothing very complicated, but it helps a lot for taking pictures of your favorite coin errors. The platform allows to tilt your coin in any angle over +/- 45 degrees . You can now optimize the rendering of the feature you want to highlight. Cost: 16$...