First thing, that is not a daggerboard. It is a
centerboard. Daggerboards slide up and down vertically in a slot. They will have a cap on the top end to keep it from going all the way through the slot and falling out. Centerboards pivot. The notch in the forward edge of your
centerboard is your pivot point. Other centerboards may have a hole drilled through the body of the board for this. Your board appears designed to slip into the centerboard trunk and "hook" onto a metal bar at the bottom of the centerboard trunk. The top of the board - where the hole is - sticks out of the centerboard trunk and is pulled forward or aft (with a pennant through the hole) to make the board go down and up. A centerboard like this is possibly from a one-design
dinghy that others may be familiar with - especially if you have more than one of them. Calling it a daggerboard in your post's title results in people who might be familiar with a centerboard
dinghy that uses a board like this ignoring the question. Centerboards by themselves are not worth much unless you can determine what kind of
boat they're for, and then find owners of that
boat who don't already have them. If there are owners who need them, better make sure their boards weren't stolen before you show up to offer them these. With that pivot point, it looks like they would be easy to unship.