My buddy PACO dug this coin today at "The Colonial Field". We know that it is German, but were wondering what its composition percentage is. Any help would be appreciated.
Mecklenburg-Schwerin - 1797
Obverse - Stylized letters FF (Friedrich Franz I reigned 1785-1837), surmounted by a crown.
Reverse - 1 SCHILLING COURANT MECKLENE . SCHWERIN MUNZE 1797
This duchy became a grand-duchy as a result of the Congress of Vienna in 1815
Here is a good sight that will explain composition of the german coins
If I were to guess at the fineness I would have to say .750. I found some references to a 32 schilling coin from the same era that is .750. Here is he link to what i found.
This coin is struck in a low-grade silver alloy called billon. Silver percentages in billon vary, but in this case the metal is 37-1/2% pure silver— i.e., .375 fine. Reported mintage for 1780 is 286,000.