This piece have already been sold here, but as is very common, the buyer did not paid. Then relisted again
The opinions of the experts of the coins forums are that this is a :
1/16 Dukat Gold Von Regensburg, 1744. Very rare to find
0.19 grams. 5 mm aprox
I got this coin from the last ones of a bracelet i Bought in Germany made with many small gold coins, Almost all of them were germans, Some sige and french coins also.
This coin is extremelly small, In my opinion issued as a gift or medal or just decorative. Friedberg (the standard gold coin catalog) say it was a 1/32 ducat coin, but in my opinion those were just issued as bullion or as gift or as representative token. Is a too small coin to be able to be used as a coin, no matter what Friedberg say
When you have on the hand you will valorate.
Sorry for the pictures, but my camera is unable to take closer pictures