Button from School

I have hunted a 50+ year old school twice recently. Not in the yard or playground just in a several acre field behind the school. 12 coins (1960-80) the ratio is one coin to three pieces of junk. Also found several head stamps, pre-1934, from when this was part of a farm. I found this odd little button, which could just be a kids shirt button, but it’s metal and it just looks odd. Probably nothing but I thought I would run it by you to see if anybody had ever seen one.
I’ll probably hit this place occasionally, it’s a fun place to learn the ORX.