Markus grading is expensive and even if your 1943 was MS (it's not) it still wouldn't be worth getting graded. Very often these coins were...
While it is possible for a 1946 to have been minted on a leftover silver war time planchet (without the large mint mark). Again, it's highly unlikely.
If it was natural and original, but I don't think it is.
Just glancing they all look bad.
While it does look like a floating roof, the condition is an issue.
Separate names with a comma.