Yea I just thought it was something else because of the 2 brass rivets they look to be like rivets found on other items used on belts and other leather items.
that is still a pretty neat find. Someone lost ti, so that alone leaves a small mystery. What was in the box? Not a big thing, but it is still poses a mystery. One never knows what can be dug up. I used to do archaeology, so it makes you wonder.