With the exception of a few very noticeable errors such as broadstruck coins, 99.9999% of bent coins are the result of damage. That makes them worth only their face value or metal value, whichever is higher.
Start with a local coin dealer. Check the yelow pages for one who is a member of the American Numismatic Society, not someone who just has some coins at the flea market.
Some dealers specialize in...
First have it examined by an expert -- try taking it to a coin show and having it examined.
Then, if it's a valuable error, have it certified by PCGS or NGC.
honestly, nobody knows. there are so many that they can never be counted. maybe everybody who has them should have like an expo or whatever you call them. then they could be counted.
I cannot find any documentary evidence of a 1943 error coin.
Any coin with a "genuine" minting flaw would have some value, above the usual, as a collectible coin.
Genuinely flawed coins are not...