This is a cross post from r/knives.

So here's the story; My dad was given this knife when he was a kid in the early 70's by his dads friend/neighbor. The neighbor said he found it washed up on the beach. The area would be Daytona beach, FL. My dad has had it for the last 35 years but has never gotten it looked at. Our hope is that this is a real, authentic pirate knife. The condition has not changed since it was found on the beach. See the specific notes on each image: http://imgur.com/a/J4Itl