Be careful, neither Ken's item mark, or the signature in Della's link look consistent with the period.. The link one looks like a dremel job. If it were copper-wheel engraved, I would expect it to show better definition. (Sorry Brian, when you say contemporary, do you mean our era?)
Kralik were known to use an acid-etched mark of Tcheco-slovaquie, in an oval, for serious pieces, and I would be expecting to see that mark and or a diamond pen signature. Signing using a diamond pen would surely bring a better defined mark. Production items, such as Della's recent iridised water service probably would have only carried a paper label.
I have my doubts, but what would I know?