This one is likely easier than the previous two (Greek/roman somethingorother and 1744 possible communion token) As always, grazi!
Koln - 6 Mariengroschen. 1700's. Can't make out the date. Don't have my references handy so someone else will have to give you the KM number and date range
Looks like it may have a little PVC residue from an old flip. You may want to give it a quick acetone rinse to remove the acidic green slime.