Something tells me by the way you asked that you already know , but here is a quick synopsis on it: Henning Nickel It's basically a popular counterfeit
Henning is the guy who counterfeited the 1944 War nickel in the early 50's but forgot to put the large mintmark above the dome. Chris
It's not much different from the bank robber who forgets to get his driver license from the teller when he flees. Chris
I would ask for better pictures, particularly of the reverse. The "R" in PLURIBUS is a typical die marker for the Henning copies.
^ That. There were also reportedly other years he faked that bear the same diagnostic on the R. '46 is one IIRC.
I wonder if he was really that ignorant or if he might have been leaving a taunt. Most things, like nickles, people see everyday and pay little mind and if we do suspect a fake, we look closely at the details while completely ignoring the bigger design elements. I honestly know nothing about him outside of reading about these in my red book as a kid, but it seems like most forgers enjoy toying with people.
I love that page. It's the one which always gets linked for Henning Nickels, and it identifies Copper Creek as where he dumped them. That's past Trenton, near Frenchtown. He actually dumped them in Cooper Creek in Haddonfield. That has, I think, distracted a few people who might have interfered with me finding the stash. Here's a more accurate article. That's not me, but I've stood where he is a few times. http://articles.philly.com/2012-07-17/news/32698938_1_nickels-secret-service-mechanical-engineer Chances are even if someone finds them now, they won't be identifiable as coins. I wouldn't exactly drink the water in that river.
I would also ask for better pictures because it looks like the coin may have been tampered with where the mint mark should be.