
Excellent closeups as well!

Up until 1990, nickel mintmarks were hand-punched on working dies, so slight variation in position and rotation are normal. That said, there are cases when
extreme misplacement* can create a premium value for the coin.
The nickels you have are normal, though. Keep searching!
*Edit: for an example of extreme, check out this article about the 1975-D:
http://www.coinworld.com/news/us-co...rs.all.html#