Help us identify this artifact!

This artifact:

1.) is made of a lightweight metal

2.) measures 2 5/8″ high by 2″ wide

3.) has hole that goes straight through

4.) written inside in pencil it says XP/X5 (inside image 2)

If you know what this artifact is or have any ideas, please leave a comment or email us at mhcmail@osumc.edu!

Image 1

Image 1

Image 2
Image 2