I recently started detecting and the first place I searched was my in-laws yard. They have about forty acres of farm land in Somerset County Maryland that was once part of larger plantation. I caught a strong signal I read as a coin. Started digging and popped out this medallion. It has the MIT seal on the front with Twenty fifth anniversary '86 engraved on the back. It looks like there was a piece on top that was broken off, maybe a small loop for a way to wear it, I'm not sure. Has anyone seen or heard of these before? Thanks.