Welcome to the forum. That looks like a partial Struck Through Grease, a minor type of error. As far as the rotation, the Obverse is not lined up properly,turn it slightly to the left and it should line up OK. I guess you are also aware that is a nickel dollar, not the silver one. As far as errors g...

Just a pin head size die chip. It will slowly enlarge with more strikes.
Not uncommon on chromium plated dies.

You had me confused there for a minute Bill, I know that there are about 13 varieties of
an “extra sail” on the Toonie but have never seen one on a dime.

I have not seen or even heard of a third sail. Can you supply a photo
or information on whear you heard this.

Welcome to the forum.

It does look plated. Have seen them plated in many colours as an aftermarket promotion.
Technically it is considered damage to the coin.

That is because the last two numbers where hand punched into the die. With each die, the location would be slightly different. You could have a near, medium, far, high, low, depending on where the mint worker punched it. As there would have been approximately the same amount of coins from each strik...

As per your 1943, they are Die Clashes.

PMG is the banknote section of NGC, one of the top two coin grading companies.
They have a good reputation and are reliable.
They have their own forum if you would like to check it out.

Die clashes are fairly common on early 40’s fifty cent coins.
What you have is a nice one extending that far.

Maybe this will help

www.saskatooncoinclub.ca/articles/05c_1 ... .html#1909

Sp3nc3r
Where abouts in Ontario are you?

As you probably know, condition is the major factor in the value of a coin. A couple of grades can make a big difference in how much a coin is worth. I have to assume that the coins you purchased are of average grade considering where you bought them. If that is the case then I would have to say tha...

Same as your 1944 cent, that is Machine Doubling.

Much better pictures, I wish you had shown those in the first place.
I agree that it is a Struck Through, most likely grease.

Both are low line.
In the future, please crop your photos. This will help increase the size.