The words "very similar" in your link description is a large red flag. Is "it" exactly as shown or what is different about it? A true photograph is needed for all identifications.
The coin is authentic to my knowledge, my father dug it out of the ground here in Germany just hours ago. Been searching for it all night. Seems to be close to a Saxon coin. Its is also very small, smaller than a penny.
Try using the Collector's Eye android app to identify your coin by taking a picture of each side. https://play.google.com/store/apps/details?id=com.CollectorsEyeFree
Better photos are needed. If it is real, nice find. Once again. The Collector's Eye is watching/spamming us. :devil:
