Solid sterling silver is marked as such and plated is also marked as such.
There are very rigid standards for marking such materials and violations are
often harshly dealt with to the manufacturers. That doesn't mean that
somebody can't mark the parts with the wrong marks but they first have to
get rid of the proper marks.
I'd do a google to see what the proper marks are as well as the manufacturer
that made the set.

--
Bob May
Losing weight is easy! If you ever want to lose weight, eat and drink less.
Works evevery time it is tried!