"German silver" is a nickel-copper-zinc alloy and contains no chemical element Ag. Deceptive terms like this were widely used in the 19th century for pocketwatch cases, all contained the word "silver" along with a qualifier, like Fahys, or nickel to mention a few.
Not bad stuff. Cleans nicely with some buffing, but has almost no scrap value. Easier to polish than sterling silver, but lacks that subtle luster.
