I got the idea for this challenge from Ground Fox.
In order for you to claim a find you must first have found the oldest non-traditional cache in 25 Michigan counties. This is a challenge cache where you must meet the requirements before claiming a find. I am fine with you signing the log and then posting the find after you have completed the challenge.
For this challenge you will need to find the oldest Letterbox, Mystery, Multi, Virtual, or Earthcache in the county. Finds on archived caches older than the current active, oldest non-traditional cache in a county do count.
It you want to see a list of the oldest active non-traditionals in every Michigan County, run this checker.
Test Checker for Michigan County oldest non-traditional caches