Here is a coin that is very similar to the Germany Augsburg 1 Heller KM A23
https://en.numista.com/catalogue/pieces45922.html


The reverse cross and quatrefoil are different.
Edge design different as well
Details:
Date 1699
Copper
side to side 11.5mm (KM A 23 is listed as 10mm)
corner to corner 14mm
Weight less than .1gr
I purchased a very large collection of coins and it was in that batch
Is this a possible variant of that coin?
I appreciate any and all assistance.
Thank you
Randy