I still have a hard time determining the reeding on the 1968 10 Cent. I know the three are nickel because they are magnetic -- but are they Ottawa or Philadelphia? Thank you for help identifying these!
The only way to tell for sure is to line the coins up against a US dime. The US dime has more ridges (118), so they will be closer together than those of a Canadian one. If the ridges all line up perfectly, then the Canadian dime was minted in Philadelphia not Ottawa. The US Mint used their own dime collars when minting them, hence the only difference.
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