1921 Canada 5 Cent Error? Help

I have a question that there's not a lot of answers on but very interesting.

So, recently I bought a 1921 Canada 5 Cent coin, it was actually found by a guy who knows nothing about coins and the story seemed pretty legit.

I examined the coin over and over trying to prove it as a fake, however it seems to pass every time except for a couple minor details.

So first, the coin weighs the exact correct amount right around 1.17 grams, 1.1664 basically, then I tested it with the facial tissue technique to see if it reflected light better than a non-silver coin and it passed that, then I checked if it was magnetic compared to a non-silver coin, once again it passed and was not magnetic, then finally I did the ice test where I took it and another coin and set it on ice and once again it proved as silver and melted instantly compared to another room temp coin.

So the coin IS silver, the minor thing I noticed was the date seemed a slight bit different style, the 9 and 2 in 1'9''2'1 seemed a bit more larger but not by much at all, and slightly different look however there is very few pictures of an actual 1921 5 cent out there but when compared to them it actually does appear that 1921 did in fact look a slight bit different than that of 1920 for instance so it seems to fall in line as the mint using a slightly different text that year.

Now the only 2 things are the crown at the top of the obverse side where it says "5 Cents Canada" appears to have a slight bit missing off the right side but on close examination it actually looks like a die crack which doesn't appear uncommon to coins in that era. The other item is when I flip the coin over the portrait of the king seems turned slightly to where it normally is, normally when you flip those years over the portrait lines up straight but this appears to be tilted to the left a bit more.

SO MY QUESTION IS: with approximately 2 million made and many melted down but there not being an exact number known out there, COULD THIS COIN BE A RARE EXAMPLE OF A 1921 ERROR COIN?

Being so rare there's not many examples out there I am just not sure. If it was a fake then it's the most accurate coin I've seen and even made of silver and the exact same as what it's suppose to be which makes me think if it were fake someone made a ton of effort to make it identical if that's even possible...?

LET ME KNOW WHAT YOU THINK?