Specifics?
Sure, you have a 1 Batzen (4 Kreutzer) from the German Free City of Isny. The mass should be abnout 3 g and the diameter 25 mm. The obv inscription is MONE NOVA CIVITAS ISN Z3 and the rev inscription is GRA CAROLVS ROM BEG. The attribution is Saurma 1516, Neu 153, Schulten 1383, and Krause MB#17. Grading yours at Fine puts the value according to my Krause at about $20. If you want to be a little more conservative and call it VG, then Krause calls it $8. IMHO, the market retail purchase rates for ISNY coins are a bit higher than the Krause listings. However, the coins of ISNY are relatively common, with an earlier (and perhaps a bit optimistically priced) Isny Batzen available right now on vcoins.
Here is a brother to your coin from my collection

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